Introduced benchmark system
diff --git a/dev/js/lib/benchmark.js b/dev/js/lib/benchmark.js
new file mode 100644
index 0000000..3ecce1d
--- /dev/null
+++ b/dev/js/lib/benchmark.js
@@ -0,0 +1,2808 @@
+/*!
+ * Benchmark.js v2.0.0 <http://benchmarkjs.com/>
+ * Copyright 2010-2016 Mathias Bynens <http://mths.be/>
+ * Based on JSLitmus.js, copyright Robert Kieffer <http://broofa.com/>
+ * Modified by John-David Dalton <http://allyoucanleet.com/>
+ * Available under MIT license <http://mths.be/mit>
+ */
+;(function() {
+ 'use strict';
+
+ /** Used as a safe reference for `undefined` in pre ES5 environments. */
+ var undefined;
+
+ /** Used to determine if values are of the language type Object. */
+ var objectTypes = {
+ 'function': true,
+ 'object': true
+ };
+
+ /** Used as a reference to the global object. */
+ var root = (objectTypes[typeof window] && window) || this;
+
+ /** Detect free variable `define`. */
+ var freeDefine = typeof define == 'function' && typeof define.amd == 'object' && define.amd && define;
+
+ /** Detect free variable `exports`. */
+ var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
+
+ /** Detect free variable `module`. */
+ var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
+
+ /** Detect free variable `global` from Node.js or Browserified code and use it as `root`. */
+ var freeGlobal = freeExports && freeModule && typeof global == 'object' && global;
+ if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {
+ root = freeGlobal;
+ }
+
+ /** Detect free variable `require`. */
+ var freeRequire = typeof require == 'function' && require;
+
+ /** Used to assign each benchmark an incremented id. */
+ var counter = 0;
+
+ /** Detect the popular CommonJS extension `module.exports`. */
+ var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
+
+ /** Used to detect primitive types. */
+ var rePrimitive = /^(?:boolean|number|string|undefined)$/;
+
+ /** Used to make every compiled test unique. */
+ var uidCounter = 0;
+
+ /** Used to assign default `context` object properties. */
+ var contextProps = [
+ 'Array', 'Date', 'Function', 'Math', 'Object', 'RegExp', 'String', '_',
+ 'clearTimeout', 'chrome', 'chromium', 'document', 'navigator', 'phantom',
+ 'platform', 'process', 'runtime', 'setTimeout'
+ ];
+
+ /** Used to avoid hz of Infinity. */
+ var divisors = {
+ '1': 4096,
+ '2': 512,
+ '3': 64,
+ '4': 8,
+ '5': 0
+ };
+
+ /**
+ * T-Distribution two-tailed critical values for 95% confidence.
+ * For more info see http://www.itl.nist.gov/div898/handbook/eda/section3/eda3672.htm.
+ */
+ var tTable = {
+ '1': 12.706, '2': 4.303, '3': 3.182, '4': 2.776, '5': 2.571, '6': 2.447,
+ '7': 2.365, '8': 2.306, '9': 2.262, '10': 2.228, '11': 2.201, '12': 2.179,
+ '13': 2.16, '14': 2.145, '15': 2.131, '16': 2.12, '17': 2.11, '18': 2.101,
+ '19': 2.093, '20': 2.086, '21': 2.08, '22': 2.074, '23': 2.069, '24': 2.064,
+ '25': 2.06, '26': 2.056, '27': 2.052, '28': 2.048, '29': 2.045, '30': 2.042,
+ 'infinity': 1.96
+ };
+
+ /**
+ * Critical Mann-Whitney U-values for 95% confidence.
+ * For more info see http://www.saburchill.com/IBbiology/stats/003.html.
+ */
+ var uTable = {
+ '5': [0, 1, 2],
+ '6': [1, 2, 3, 5],
+ '7': [1, 3, 5, 6, 8],
+ '8': [2, 4, 6, 8, 10, 13],
+ '9': [2, 4, 7, 10, 12, 15, 17],
+ '10': [3, 5, 8, 11, 14, 17, 20, 23],
+ '11': [3, 6, 9, 13, 16, 19, 23, 26, 30],
+ '12': [4, 7, 11, 14, 18, 22, 26, 29, 33, 37],
+ '13': [4, 8, 12, 16, 20, 24, 28, 33, 37, 41, 45],
+ '14': [5, 9, 13, 17, 22, 26, 31, 36, 40, 45, 50, 55],
+ '15': [5, 10, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64],
+ '16': [6, 11, 15, 21, 26, 31, 37, 42, 47, 53, 59, 64, 70, 75],
+ '17': [6, 11, 17, 22, 28, 34, 39, 45, 51, 57, 63, 67, 75, 81, 87],
+ '18': [7, 12, 18, 24, 30, 36, 42, 48, 55, 61, 67, 74, 80, 86, 93, 99],
+ '19': [7, 13, 19, 25, 32, 38, 45, 52, 58, 65, 72, 78, 85, 92, 99, 106, 113],
+ '20': [8, 14, 20, 27, 34, 41, 48, 55, 62, 69, 76, 83, 90, 98, 105, 112, 119, 127],
+ '21': [8, 15, 22, 29, 36, 43, 50, 58, 65, 73, 80, 88, 96, 103, 111, 119, 126, 134, 142],
+ '22': [9, 16, 23, 30, 38, 45, 53, 61, 69, 77, 85, 93, 101, 109, 117, 125, 133, 141, 150, 158],
+ '23': [9, 17, 24, 32, 40, 48, 56, 64, 73, 81, 89, 98, 106, 115, 123, 132, 140, 149, 157, 166, 175],
+ '24': [10, 17, 25, 33, 42, 50, 59, 67, 76, 85, 94, 102, 111, 120, 129, 138, 147, 156, 165, 174, 183, 192],
+ '25': [10, 18, 27, 35, 44, 53, 62, 71, 80, 89, 98, 107, 117, 126, 135, 145, 154, 163, 173, 182, 192, 201, 211],
+ '26': [11, 19, 28, 37, 46, 55, 64, 74, 83, 93, 102, 112, 122, 132, 141, 151, 161, 171, 181, 191, 200, 210, 220, 230],
+ '27': [11, 20, 29, 38, 48, 57, 67, 77, 87, 97, 107, 118, 125, 138, 147, 158, 168, 178, 188, 199, 209, 219, 230, 240, 250],
+ '28': [12, 21, 30, 40, 50, 60, 70, 80, 90, 101, 111, 122, 132, 143, 154, 164, 175, 186, 196, 207, 218, 228, 239, 250, 261, 272],
+ '29': [13, 22, 32, 42, 52, 62, 73, 83, 94, 105, 116, 127, 138, 149, 160, 171, 182, 193, 204, 215, 226, 238, 249, 260, 271, 282, 294],
+ '30': [13, 23, 33, 43, 54, 65, 76, 87, 98, 109, 120, 131, 143, 154, 166, 177, 189, 200, 212, 223, 235, 247, 258, 270, 282, 293, 305, 317]
+ };
+
+ /*--------------------------------------------------------------------------*/
+
+ /**
+ * Create a new `Benchmark` function using the given `context` object.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @param {Object} [context=root] The context object.
+ * @returns {Function} Returns a new `Benchmark` function.
+ */
+ function runInContext(context) {
+ // Exit early if unable to acquire lodash.
+ var _ = context && context._ || req('lodash') || root._;
+ if (!_) {
+ Benchmark.runInContext = runInContext;
+ return Benchmark;
+ }
+ // Avoid issues with some ES3 environments that attempt to use values, named
+ // after built-in constructors like `Object`, for the creation of literals.
+ // ES5 clears this up by stating that literals must use built-in constructors.
+ // See http://es5.github.io/#x11.1.5.
+ context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;
+
+ /** Native constructor references. */
+ var Array = context.Array,
+ Date = context.Date,
+ Function = context.Function,
+ Math = context.Math,
+ Object = context.Object,
+ RegExp = context.RegExp,
+ String = context.String;
+
+ /** Used for `Array` and `Object` method references. */
+ var arrayRef = [],
+ objectProto = Object.prototype;
+
+ /** Native method shortcuts. */
+ var abs = Math.abs,
+ clearTimeout = context.clearTimeout,
+ floor = Math.floor,
+ log = Math.log,
+ max = Math.max,
+ min = Math.min,
+ pow = Math.pow,
+ push = arrayRef.push,
+ setTimeout = context.setTimeout,
+ shift = arrayRef.shift,
+ slice = arrayRef.slice,
+ sqrt = Math.sqrt,
+ toString = objectProto.toString,
+ unshift = arrayRef.unshift;
+
+ /** Detect DOM document object. */
+ var doc = isHostType(context, 'document') && context.document;
+
+ /** Used to access Wade Simmons' Node.js `microtime` module. */
+ var microtimeObject = req('microtime');
+
+ /** Used to access Node.js's high resolution timer. */
+ var processObject = isHostType(context, 'process') && context.process;
+
+ /** Used to prevent a `removeChild` memory leak in IE < 9. */
+ var trash = doc && doc.createElement('div');
+
+ /** Used to integrity check compiled tests. */
+ var uid = 'uid' + _.now();
+
+ /** Used to avoid infinite recursion when methods call each other. */
+ var calledBy = {};
+
+ /**
+ * An object used to flag environments/features.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @type Object
+ */
+ var support = {};
+
+ (function() {
+
+ /**
+ * Detect if running in a browser environment.
+ *
+ * @memberOf Benchmark.support
+ * @type boolean
+ */
+ support.browser = doc && isHostType(context, 'navigator') && !isHostType(context, 'phantom');
+
+ /**
+ * Detect if the Timers API exists.
+ *
+ * @memberOf Benchmark.support
+ * @type boolean
+ */
+ support.timeout = isHostType(context, 'setTimeout') && isHostType(context, 'clearTimeout');
+
+ /**
+ * Detect if function decompilation is support.
+ *
+ * @name decompilation
+ * @memberOf Benchmark.support
+ * @type boolean
+ */
+ try {
+ // Safari 2.x removes commas in object literals from `Function#toString` results.
+ // See http://webk.it/11609 for more details.
+ // Firefox 3.6 and Opera 9.25 strip grouping parentheses from `Function#toString` results.
+ // See http://bugzil.la/559438 for more details.
+ support.decompilation = Function(
+ ('return (' + (function(x) { return { 'x': '' + (1 + x) + '', 'y': 0 }; }) + ')')
+ // Avoid issues with code added by Istanbul.
+ .replace(/__cov__[^;]+;/g, '')
+ )()(0).x === '1';
+ } catch(e) {
+ support.decompilation = false;
+ }
+ }());
+
+ /**
+ * Timer object used by `clock()` and `Deferred#resolve`.
+ *
+ * @private
+ * @type Object
+ */
+ var timer = {
+
+ /**
+ * The timer namespace object or constructor.
+ *
+ * @private
+ * @memberOf timer
+ * @type {Function|Object}
+ */
+ 'ns': Date,
+
+ /**
+ * Starts the deferred timer.
+ *
+ * @private
+ * @memberOf timer
+ * @param {Object} deferred The deferred instance.
+ */
+ 'start': null, // Lazy defined in `clock()`.
+
+ /**
+ * Stops the deferred timer.
+ *
+ * @private
+ * @memberOf timer
+ * @param {Object} deferred The deferred instance.
+ */
+ 'stop': null // Lazy defined in `clock()`.
+ };
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * The Benchmark constructor.
+ *
+ * Note: The Benchmark constructor exposes a handful of lodash methods to
+ * make working with arrays, collections, and objects easier. The lodash
+ * methods are:
+ * [`each/forEach`](https://lodash.com/docs#forEach), [`forOwn`](https://lodash.com/docs#forOwn),
+ * [`has`](https://lodash.com/docs#has), [`indexOf`](https://lodash.com/docs#indexOf),
+ * [`map`](https://lodash.com/docs#map), and [`reduce`](https://lodash.com/docs#reduce)
+ *
+ * @constructor
+ * @param {string} name A name to identify the benchmark.
+ * @param {Function|string} fn The test to benchmark.
+ * @param {Object} [options={}] Options object.
+ * @example
+ *
+ * // basic usage (the `new` operator is optional)
+ * var bench = new Benchmark(fn);
+ *
+ * // or using a name first
+ * var bench = new Benchmark('foo', fn);
+ *
+ * // or with options
+ * var bench = new Benchmark('foo', fn, {
+ *
+ * // displayed by `Benchmark#toString` if `name` is not available
+ * 'id': 'xyz',
+ *
+ * // called when the benchmark starts running
+ * 'onStart': onStart,
+ *
+ * // called after each run cycle
+ * 'onCycle': onCycle,
+ *
+ * // called when aborted
+ * 'onAbort': onAbort,
+ *
+ * // called when a test errors
+ * 'onError': onError,
+ *
+ * // called when reset
+ * 'onReset': onReset,
+ *
+ * // called when the benchmark completes running
+ * 'onComplete': onComplete,
+ *
+ * // compiled/called before the test loop
+ * 'setup': setup,
+ *
+ * // compiled/called after the test loop
+ * 'teardown': teardown
+ * });
+ *
+ * // or name and options
+ * var bench = new Benchmark('foo', {
+ *
+ * // a flag to indicate the benchmark is deferred
+ * 'defer': true,
+ *
+ * // benchmark test function
+ * 'fn': function(deferred) {
+ * // call `Deferred#resolve` when the deferred test is finished
+ * deferred.resolve();
+ * }
+ * });
+ *
+ * // or options only
+ * var bench = new Benchmark({
+ *
+ * // benchmark name
+ * 'name': 'foo',
+ *
+ * // benchmark test as a string
+ * 'fn': '[1,2,3,4].sort()'
+ * });
+ *
+ * // a test's `this` binding is set to the benchmark instance
+ * var bench = new Benchmark('foo', function() {
+ * 'My name is '.concat(this.name); // "My name is foo"
+ * });
+ */
+ function Benchmark(name, fn, options) {
+ var bench = this;
+
+ // Allow instance creation without the `new` operator.
+ if (!(bench instanceof Benchmark)) {
+ return new Benchmark(name, fn, options);
+ }
+ // Juggle arguments.
+ if (_.isPlainObject(name)) {
+ // 1 argument (options).
+ options = name;
+ }
+ else if (_.isFunction(name)) {
+ // 2 arguments (fn, options).
+ options = fn;
+ fn = name;
+ }
+ else if (_.isPlainObject(fn)) {
+ // 2 arguments (name, options).
+ options = fn;
+ fn = null;
+ bench.name = name;
+ }
+ else {
+ // 3 arguments (name, fn [, options]).
+ bench.name = name;
+ }
+ setOptions(bench, options);
+
+ bench.id || (bench.id = ++counter);
+ bench.fn == null && (bench.fn = fn);
+
+ bench.stats = cloneDeep(bench.stats);
+ bench.times = cloneDeep(bench.times);
+ }
+
+ /**
+ * The Deferred constructor.
+ *
+ * @constructor
+ * @memberOf Benchmark
+ * @param {Object} clone The cloned benchmark instance.
+ */
+ function Deferred(clone) {
+ var deferred = this;
+ if (!(deferred instanceof Deferred)) {
+ return new Deferred(clone);
+ }
+ deferred.benchmark = clone;
+ clock(deferred);
+ }
+
+ /**
+ * The Event constructor.
+ *
+ * @constructor
+ * @memberOf Benchmark
+ * @param {Object|string} type The event type.
+ */
+ function Event(type) {
+ var event = this;
+ if (type instanceof Event) {
+ return type;
+ }
+ return (event instanceof Event)
+ ? _.assign(event, { 'timeStamp': _.now() }, typeof type == 'string' ? { 'type': type } : type)
+ : new Event(type);
+ }
+
+ /**
+ * The Suite constructor.
+ *
+ * Note: Each Suite instance has a handful of wrapped lodash methods to
+ * make working with Suites easier. The wrapped lodash methods are:
+ * [`each/forEach`](https://lodash.com/docs#forEach), [`indexOf`](https://lodash.com/docs#indexOf),
+ * [`map`](https://lodash.com/docs#map), and [`reduce`](https://lodash.com/docs#reduce)
+ *
+ * @constructor
+ * @memberOf Benchmark
+ * @param {string} name A name to identify the suite.
+ * @param {Object} [options={}] Options object.
+ * @example
+ *
+ * // basic usage (the `new` operator is optional)
+ * var suite = new Benchmark.Suite;
+ *
+ * // or using a name first
+ * var suite = new Benchmark.Suite('foo');
+ *
+ * // or with options
+ * var suite = new Benchmark.Suite('foo', {
+ *
+ * // called when the suite starts running
+ * 'onStart': onStart,
+ *
+ * // called between running benchmarks
+ * 'onCycle': onCycle,
+ *
+ * // called when aborted
+ * 'onAbort': onAbort,
+ *
+ * // called when a test errors
+ * 'onError': onError,
+ *
+ * // called when reset
+ * 'onReset': onReset,
+ *
+ * // called when the suite completes running
+ * 'onComplete': onComplete
+ * });
+ */
+ function Suite(name, options) {
+ var suite = this;
+
+ // Allow instance creation without the `new` operator.
+ if (!(suite instanceof Suite)) {
+ return new Suite(name, options);
+ }
+ // Juggle arguments.
+ if (_.isPlainObject(name)) {
+ // 1 argument (options).
+ options = name;
+ } else {
+ // 2 arguments (name [, options]).
+ suite.name = name;
+ }
+ setOptions(suite, options);
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * A specialized version of `_.cloneDeep` which only clones arrays and plain
+ * objects assigning all other values by reference.
+ *
+ * @private
+ * @param {*} value The value to clone.
+ * @returns {*} The cloned value.
+ */
+ var cloneDeep = _.partial(_.cloneDeepWith || _.cloneDeep, _, function(value) {
+ // Only clone primitives, arrays, and plain objects.
+ return (_.isObject(value) && !_.isArray(value) && !_.isPlainObject(value))
+ ? value
+ : undefined;
+ });
+
+ /**
+ * Creates a function from the given arguments string and body.
+ *
+ * @private
+ * @param {string} args The comma separated function arguments.
+ * @param {string} body The function body.
+ * @returns {Function} The new function.
+ */
+ function createFunction() {
+ // Lazy define.
+ createFunction = function(args, body) {
+ var result,
+ anchor = freeDefine ? freeDefine.amd : Benchmark,
+ prop = uid + 'createFunction';
+
+ runScript((freeDefine ? 'define.amd.' : 'Benchmark.') + prop + '=function(' + args + '){' + body + '}');
+ result = anchor[prop];
+ delete anchor[prop];
+ return result;
+ };
+ // Fix JaegerMonkey bug.
+ // For more information see http://bugzil.la/639720.
+ createFunction = support.browser && (createFunction('', 'return"' + uid + '"') || _.noop)() == uid ? createFunction : Function;
+ return createFunction.apply(null, arguments);
+ }
+
+ /**
+ * Delay the execution of a function based on the benchmark's `delay` property.
+ *
+ * @private
+ * @param {Object} bench The benchmark instance.
+ * @param {Object} fn The function to execute.
+ */
+ function delay(bench, fn) {
+ bench._timerId = _.delay(fn, bench.delay * 1e3);
+ }
+
+ /**
+ * Destroys the given element.
+ *
+ * @private
+ * @param {Element} element The element to destroy.
+ */
+ function destroyElement(element) {
+ trash.appendChild(element);
+ trash.innerHTML = '';
+ }
+
+ /**
+ * Gets the name of the first argument from a function's source.
+ *
+ * @private
+ * @param {Function} fn The function.
+ * @returns {string} The argument name.
+ */
+ function getFirstArgument(fn) {
+ return (!_.has(fn, 'toString') &&
+ (/^[\s(]*function[^(]*\(([^\s,)]+)/.exec(fn) || 0)[1]) || '';
+ }
+
+ /**
+ * Computes the arithmetic mean of a sample.
+ *
+ * @private
+ * @param {Array} sample The sample.
+ * @returns {number} The mean.
+ */
+ function getMean(sample) {
+ return (_.reduce(sample, function(sum, x) {
+ return sum + x;
+ }) / sample.length) || 0;
+ }
+
+ /**
+ * Gets the source code of a function.
+ *
+ * @private
+ * @param {Function} fn The function.
+ * @returns {string} The function's source code.
+ */
+ function getSource(fn) {
+ var result = '';
+ if (isStringable(fn)) {
+ result = String(fn);
+ } else if (support.decompilation) {
+ // Escape the `{` for Firefox 1.
+ result = _.result(/^[^{]+\{([\s\S]*)\}\s*$/.exec(fn), 1);
+ }
+ // Trim string.
+ result = (result || '').replace(/^\s+|\s+$/g, '');
+
+ // Detect strings containing only the "use strict" directive.
+ return /^(?:\/\*+[\w\W]*?\*\/|\/\/.*?[\n\r\u2028\u2029]|\s)*(["'])use strict\1;?$/.test(result)
+ ? ''
+ : result;
+ }
+
+ /**
+ * Checks if an object is of the specified class.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @param {string} name The name of the class.
+ * @returns {boolean} Returns `true` if the value is of the specified class, else `false`.
+ */
+ function isClassOf(value, name) {
+ return value != null && toString.call(value) == '[object ' + name + ']';
+ }
+
+ /**
+ * Host objects can return type values that are different from their actual
+ * data type. The objects we are concerned with usually return non-primitive
+ * types of "object", "function", or "unknown".
+ *
+ * @private
+ * @param {*} object The owner of the property.
+ * @param {string} property The property to check.
+ * @returns {boolean} Returns `true` if the property value is a non-primitive, else `false`.
+ */
+ function isHostType(object, property) {
+ if (object == null) {
+ return false;
+ }
+ var type = typeof object[property];
+ return !rePrimitive.test(type) && (type != 'object' || !!object[property]);
+ }
+
+ /**
+ * Checks if a value can be safely coerced to a string.
+ *
+ * @private
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the value can be coerced, else `false`.
+ */
+ function isStringable(value) {
+ return _.isString(value) || (_.has(value, 'toString') && _.isFunction(value.toString));
+ }
+
+ /**
+ * A wrapper around `require` to suppress `module missing` errors.
+ *
+ * @private
+ * @param {string} id The module id.
+ * @returns {*} The exported module or `null`.
+ */
+ function req(id) {
+ try {
+ var result = freeExports && freeRequire(id);
+ } catch(e) {}
+ return result || null;
+ }
+
+ /**
+ * Runs a snippet of JavaScript via script injection.
+ *
+ * @private
+ * @param {string} code The code to run.
+ */
+ function runScript(code) {
+ var anchor = freeDefine ? define.amd : Benchmark,
+ script = doc.createElement('script'),
+ sibling = doc.getElementsByTagName('script')[0],
+ parent = sibling.parentNode,
+ prop = uid + 'runScript',
+ prefix = '(' + (freeDefine ? 'define.amd.' : 'Benchmark.') + prop + '||function(){})();';
+
+ // Firefox 2.0.0.2 cannot use script injection as intended because it executes
+ // asynchronously, but that's OK because script injection is only used to avoid
+ // the previously commented JaegerMonkey bug.
+ try {
+ // Remove the inserted script *before* running the code to avoid differences
+ // in the expected script element count/order of the document.
+ script.appendChild(doc.createTextNode(prefix + code));
+ anchor[prop] = function() { destroyElement(script); };
+ } catch(e) {
+ parent = parent.cloneNode(false);
+ sibling = null;
+ script.text = code;
+ }
+ parent.insertBefore(script, sibling);
+ delete anchor[prop];
+ }
+
+ /**
+ * A helper function for setting options/event handlers.
+ *
+ * @private
+ * @param {Object} object The benchmark or suite instance.
+ * @param {Object} [options={}] Options object.
+ */
+ function setOptions(object, options) {
+ options = object.options = _.assign({}, cloneDeep(object.constructor.options), cloneDeep(options));
+
+ _.forOwn(options, function(value, key) {
+ if (value != null) {
+ // Add event listeners.
+ if (/^on[A-Z]/.test(key)) {
+ _.each(key.split(' '), function(key) {
+ object.on(key.slice(2).toLowerCase(), value);
+ });
+ } else if (!_.has(object, key)) {
+ object[key] = cloneDeep(value);
+ }
+ }
+ });
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Handles cycling/completing the deferred benchmark.
+ *
+ * @memberOf Benchmark.Deferred
+ */
+ function resolve() {
+ var deferred = this,
+ clone = deferred.benchmark,
+ bench = clone._original;
+
+ if (bench.aborted) {
+ // cycle() -> clone cycle/complete event -> compute()'s invoked bench.run() cycle/complete.
+ deferred.teardown();
+ clone.running = false;
+ cycle(deferred);
+ }
+ else if (++deferred.cycles < clone.count) {
+ clone.compiled.call(deferred, context, timer);
+ }
+ else {
+ timer.stop(deferred);
+ deferred.teardown();
+ delay(clone, function() { cycle(deferred); });
+ }
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * A generic `Array#filter` like method.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @param {Array} array The array to iterate over.
+ * @param {Function|string} callback The function/alias called per iteration.
+ * @returns {Array} A new array of values that passed callback filter.
+ * @example
+ *
+ * // get odd numbers
+ * Benchmark.filter([1, 2, 3, 4, 5], function(n) {
+ * return n % 2;
+ * }); // -> [1, 3, 5];
+ *
+ * // get fastest benchmarks
+ * Benchmark.filter(benches, 'fastest');
+ *
+ * // get slowest benchmarks
+ * Benchmark.filter(benches, 'slowest');
+ *
+ * // get benchmarks that completed without erroring
+ * Benchmark.filter(benches, 'successful');
+ */
+ function filter(array, callback) {
+ if (callback === 'successful') {
+ // Callback to exclude those that are errored, unrun, or have hz of Infinity.
+ callback = function(bench) {
+ return bench.cycles && _.isFinite(bench.hz);
+ };
+ }
+ else if (callback === 'fastest' || callback === 'slowest') {
+ // Get successful, sort by period + margin of error, and filter fastest/slowest.
+ var result = filter(array, 'successful').sort(function(a, b) {
+ a = a.stats; b = b.stats;
+ return (a.mean + a.moe > b.mean + b.moe ? 1 : -1) * (callback === 'fastest' ? 1 : -1);
+ });
+
+ return _.filter(result, function(bench) {
+ return result[0].compare(bench) == 0;
+ });
+ }
+ return _.filter(array, callback);
+ }
+
+ /**
+ * Converts a number to a more readable comma-separated string representation.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @param {number} number The number to convert.
+ * @returns {string} The more readable string representation.
+ */
+ function formatNumber(number) {
+ number = String(number).split('.');
+ return number[0].replace(/(?=(?:\d{3})+$)(?!\b)/g, ',') +
+ (number[1] ? '.' + number[1] : '');
+ }
+
+ /**
+ * Invokes a method on all items in an array.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @param {Array} benches Array of benchmarks to iterate over.
+ * @param {Object|string} name The name of the method to invoke OR options object.
+ * @param {...*} [args] Arguments to invoke the method with.
+ * @returns {Array} A new array of values returned from each method invoked.
+ * @example
+ *
+ * // invoke `reset` on all benchmarks
+ * Benchmark.invoke(benches, 'reset');
+ *
+ * // invoke `emit` with arguments
+ * Benchmark.invoke(benches, 'emit', 'complete', listener);
+ *
+ * // invoke `run(true)`, treat benchmarks as a queue, and register invoke callbacks
+ * Benchmark.invoke(benches, {
+ *
+ * // invoke the `run` method
+ * 'name': 'run',
+ *
+ * // pass a single argument
+ * 'args': true,
+ *
+ * // treat as queue, removing benchmarks from front of `benches` until empty
+ * 'queued': true,
+ *
+ * // called before any benchmarks have been invoked.
+ * 'onStart': onStart,
+ *
+ * // called between invoking benchmarks
+ * 'onCycle': onCycle,
+ *
+ * // called after all benchmarks have been invoked.
+ * 'onComplete': onComplete
+ * });
+ */
+ function invoke(benches, name) {
+ var args,
+ bench,
+ queued,
+ index = -1,
+ eventProps = { 'currentTarget': benches },
+ options = { 'onStart': _.noop, 'onCycle': _.noop, 'onComplete': _.noop },
+ result = _.toArray(benches);
+
+ /**
+ * Invokes the method of the current object and if synchronous, fetches the next.
+ */
+ function execute() {
+ var listeners,
+ async = isAsync(bench);
+
+ if (async) {
+ // Use `getNext` as the first listener.
+ bench.on('complete', getNext);
+ listeners = bench.events.complete;
+ listeners.splice(0, 0, listeners.pop());
+ }
+ // Execute method.
+ result[index] = _.isFunction(bench && bench[name]) ? bench[name].apply(bench, args) : undefined;
+ // If synchronous return `true` until finished.
+ return !async && getNext();
+ }
+
+ /**
+ * Fetches the next bench or executes `onComplete` callback.
+ */
+ function getNext(event) {
+ var cycleEvent,
+ last = bench,
+ async = isAsync(last);
+
+ if (async) {
+ last.off('complete', getNext);
+ last.emit('complete');
+ }
+ // Emit "cycle" event.
+ eventProps.type = 'cycle';
+ eventProps.target = last;
+ cycleEvent = Event(eventProps);
+ options.onCycle.call(benches, cycleEvent);
+
+ // Choose next benchmark if not exiting early.
+ if (!cycleEvent.aborted && raiseIndex() !== false) {
+ bench = queued ? benches[0] : result[index];
+ if (isAsync(bench)) {
+ delay(bench, execute);
+ }
+ else if (async) {
+ // Resume execution if previously asynchronous but now synchronous.
+ while (execute()) {}
+ }
+ else {
+ // Continue synchronous execution.
+ return true;
+ }
+ } else {
+ // Emit "complete" event.
+ eventProps.type = 'complete';
+ options.onComplete.call(benches, Event(eventProps));
+ }
+ // When used as a listener `event.aborted = true` will cancel the rest of
+ // the "complete" listeners because they were already called above and when
+ // used as part of `getNext` the `return false` will exit the execution while-loop.
+ if (event) {
+ event.aborted = true;
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Checks if invoking `Benchmark#run` with asynchronous cycles.
+ */
+ function isAsync(object) {
+ // Avoid using `instanceof` here because of IE memory leak issues with host objects.
+ var async = args[0] && args[0].async;
+ return name == 'run' && (object instanceof Benchmark) &&
+ ((async == null ? object.options.async : async) && support.timeout || object.defer);
+ }
+
+ /**
+ * Raises `index` to the next defined index or returns `false`.
+ */
+ function raiseIndex() {
+ index++;
+
+ // If queued remove the previous bench.
+ if (queued && index > 0) {
+ shift.call(benches);
+ }
+ // If we reached the last index then return `false`.
+ return (queued ? benches.length : index < result.length)
+ ? index
+ : (index = false);
+ }
+ // Juggle arguments.
+ if (_.isString(name)) {
+ // 2 arguments (array, name).
+ args = slice.call(arguments, 2);
+ } else {
+ // 2 arguments (array, options).
+ options = _.assign(options, name);
+ name = options.name;
+ args = _.isArray(args = 'args' in options ? options.args : []) ? args : [args];
+ queued = options.queued;
+ }
+ // Start iterating over the array.
+ if (raiseIndex() !== false) {
+ // Emit "start" event.
+ bench = result[index];
+ eventProps.type = 'start';
+ eventProps.target = bench;
+ options.onStart.call(benches, Event(eventProps));
+
+ // End early if the suite was aborted in an "onStart" listener.
+ if (name == 'run' && (benches instanceof Suite) && benches.aborted) {
+ // Emit "cycle" event.
+ eventProps.type = 'cycle';
+ options.onCycle.call(benches, Event(eventProps));
+ // Emit "complete" event.
+ eventProps.type = 'complete';
+ options.onComplete.call(benches, Event(eventProps));
+ }
+ // Start method execution.
+ else {
+ if (isAsync(bench)) {
+ delay(bench, execute);
+ } else {
+ while (execute()) {}
+ }
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Creates a string of joined array values or object key-value pairs.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @param {Array|Object} object The object to operate on.
+ * @param {string} [separator1=','] The separator used between key-value pairs.
+ * @param {string} [separator2=': '] The separator used between keys and values.
+ * @returns {string} The joined result.
+ */
+ function join(object, separator1, separator2) {
+ var result = [],
+ length = (object = Object(object)).length,
+ arrayLike = length === length >>> 0;
+
+ separator2 || (separator2 = ': ');
+ _.each(object, function(value, key) {
+ result.push(arrayLike ? value : key + separator2 + value);
+ });
+ return result.join(separator1 || ',');
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Aborts all benchmarks in the suite.
+ *
+ * @name abort
+ * @memberOf Benchmark.Suite
+ * @returns {Object} The suite instance.
+ */
+ function abortSuite() {
+ var event,
+ suite = this,
+ resetting = calledBy.resetSuite;
+
+ if (suite.running) {
+ event = Event('abort');
+ suite.emit(event);
+ if (!event.cancelled || resetting) {
+ // Avoid infinite recursion.
+ calledBy.abortSuite = true;
+ suite.reset();
+ delete calledBy.abortSuite;
+
+ if (!resetting) {
+ suite.aborted = true;
+ invoke(suite, 'abort');
+ }
+ }
+ }
+ return suite;
+ }
+
+ /**
+ * Adds a test to the benchmark suite.
+ *
+ * @memberOf Benchmark.Suite
+ * @param {string} name A name to identify the benchmark.
+ * @param {Function|string} fn The test to benchmark.
+ * @param {Object} [options={}] Options object.
+ * @returns {Object} The benchmark instance.
+ * @example
+ *
+ * // basic usage
+ * suite.add(fn);
+ *
+ * // or using a name first
+ * suite.add('foo', fn);
+ *
+ * // or with options
+ * suite.add('foo', fn, {
+ * 'onCycle': onCycle,
+ * 'onComplete': onComplete
+ * });
+ *
+ * // or name and options
+ * suite.add('foo', {
+ * 'fn': fn,
+ * 'onCycle': onCycle,
+ * 'onComplete': onComplete
+ * });
+ *
+ * // or options only
+ * suite.add({
+ * 'name': 'foo',
+ * 'fn': fn,
+ * 'onCycle': onCycle,
+ * 'onComplete': onComplete
+ * });
+ */
+ function add(name, fn, options) {
+ var suite = this,
+ bench = new Benchmark(name, fn, options),
+ event = Event({ 'type': 'add', 'target': bench });
+
+ if (suite.emit(event), !event.cancelled) {
+ suite.push(bench);
+ }
+ return suite;
+ }
+
+ /**
+ * Creates a new suite with cloned benchmarks.
+ *
+ * @name clone
+ * @memberOf Benchmark.Suite
+ * @param {Object} options Options object to overwrite cloned options.
+ * @returns {Object} The new suite instance.
+ */
+ function cloneSuite(options) {
+ var suite = this,
+ result = new suite.constructor(_.assign({}, suite.options, options));
+
+ // Copy own properties.
+ _.forOwn(suite, function(value, key) {
+ if (!_.has(result, key)) {
+ result[key] = value && _.isFunction(value.clone)
+ ? value.clone()
+ : cloneDeep(value);
+ }
+ });
+ return result;
+ }
+
+ /**
+ * An `Array#filter` like method.
+ *
+ * @name filter
+ * @memberOf Benchmark.Suite
+ * @param {Function|string} callback The function/alias called per iteration.
+ * @returns {Object} A new suite of benchmarks that passed callback filter.
+ */
+ function filterSuite(callback) {
+ var suite = this,
+ result = new suite.constructor(suite.options);
+
+ result.push.apply(result, filter(suite, callback));
+ return result;
+ }
+
+ /**
+ * Resets all benchmarks in the suite.
+ *
+ * @name reset
+ * @memberOf Benchmark.Suite
+ * @returns {Object} The suite instance.
+ */
+ function resetSuite() {
+ var event,
+ suite = this,
+ aborting = calledBy.abortSuite;
+
+ if (suite.running && !aborting) {
+ // No worries, `resetSuite()` is called within `abortSuite()`.
+ calledBy.resetSuite = true;
+ suite.abort();
+ delete calledBy.resetSuite;
+ }
+ // Reset if the state has changed.
+ else if ((suite.aborted || suite.running) &&
+ (suite.emit(event = Event('reset')), !event.cancelled)) {
+ suite.aborted = suite.running = false;
+ if (!aborting) {
+ invoke(suite, 'reset');
+ }
+ }
+ return suite;
+ }
+
+ /**
+ * Runs the suite.
+ *
+ * @name run
+ * @memberOf Benchmark.Suite
+ * @param {Object} [options={}] Options object.
+ * @returns {Object} The suite instance.
+ * @example
+ *
+ * // basic usage
+ * suite.run();
+ *
+ * // or with options
+ * suite.run({ 'async': true, 'queued': true });
+ */
+ function runSuite(options) {
+ var suite = this;
+
+ suite.reset();
+ suite.running = true;
+ options || (options = {});
+
+ invoke(suite, {
+ 'name': 'run',
+ 'args': options,
+ 'queued': options.queued,
+ 'onStart': function(event) {
+ suite.emit(event);
+ },
+ 'onCycle': function(event) {
+ var bench = event.target;
+ if (bench.error) {
+ suite.emit({ 'type': 'error', 'target': bench });
+ }
+ suite.emit(event);
+ event.aborted = suite.aborted;
+ },
+ 'onComplete': function(event) {
+ suite.running = false;
+ suite.emit(event);
+ }
+ });
+ return suite;
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Executes all registered listeners of the specified event type.
+ *
+ * @memberOf Benchmark, Benchmark.Suite
+ * @param {Object|string} type The event type or object.
+ * @param {...*} [args] Arguments to invoke the listener with.
+ * @returns {*} Returns the return value of the last listener executed.
+ */
+ function emit(type) {
+ var listeners,
+ object = this,
+ event = Event(type),
+ events = object.events,
+ args = (arguments[0] = event, arguments);
+
+ event.currentTarget || (event.currentTarget = object);
+ event.target || (event.target = object);
+ delete event.result;
+
+ if (events && (listeners = _.has(events, event.type) && events[event.type])) {
+ _.each(listeners.slice(), function(listener) {
+ if ((event.result = listener.apply(object, args)) === false) {
+ event.cancelled = true;
+ }
+ return !event.aborted;
+ });
+ }
+ return event.result;
+ }
+
+ /**
+ * Returns an array of event listeners for a given type that can be manipulated
+ * to add or remove listeners.
+ *
+ * @memberOf Benchmark, Benchmark.Suite
+ * @param {string} type The event type.
+ * @returns {Array} The listeners array.
+ */
+ function listeners(type) {
+ var object = this,
+ events = object.events || (object.events = {});
+
+ return _.has(events, type) ? events[type] : (events[type] = []);
+ }
+
+ /**
+ * Unregisters a listener for the specified event type(s),
+ * or unregisters all listeners for the specified event type(s),
+ * or unregisters all listeners for all event types.
+ *
+ * @memberOf Benchmark, Benchmark.Suite
+ * @param {string} [type] The event type.
+ * @param {Function} [listener] The function to unregister.
+ * @returns {Object} The benchmark instance.
+ * @example
+ *
+ * // unregister a listener for an event type
+ * bench.off('cycle', listener);
+ *
+ * // unregister a listener for multiple event types
+ * bench.off('start cycle', listener);
+ *
+ * // unregister all listeners for an event type
+ * bench.off('cycle');
+ *
+ * // unregister all listeners for multiple event types
+ * bench.off('start cycle complete');
+ *
+ * // unregister all listeners for all event types
+ * bench.off();
+ */
+ function off(type, listener) {
+ var object = this,
+ events = object.events;
+
+ if (!events) {
+ return object;
+ }
+ _.each(type ? type.split(' ') : events, function(listeners, type) {
+ var index;
+ if (typeof listeners == 'string') {
+ type = listeners;
+ listeners = _.has(events, type) && events[type];
+ }
+ if (listeners) {
+ if (listener) {
+ index = _.indexOf(listeners, listener);
+ if (index > -1) {
+ listeners.splice(index, 1);
+ }
+ } else {
+ listeners.length = 0;
+ }
+ }
+ });
+ return object;
+ }
+
+ /**
+ * Registers a listener for the specified event type(s).
+ *
+ * @memberOf Benchmark, Benchmark.Suite
+ * @param {string} type The event type.
+ * @param {Function} listener The function to register.
+ * @returns {Object} The benchmark instance.
+ * @example
+ *
+ * // register a listener for an event type
+ * bench.on('cycle', listener);
+ *
+ * // register a listener for multiple event types
+ * bench.on('start cycle', listener);
+ */
+ function on(type, listener) {
+ var object = this,
+ events = object.events || (object.events = {});
+
+ _.each(type.split(' '), function(type) {
+ (_.has(events, type)
+ ? events[type]
+ : (events[type] = [])
+ ).push(listener);
+ });
+ return object;
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Aborts the benchmark without recording times.
+ *
+ * @memberOf Benchmark
+ * @returns {Object} The benchmark instance.
+ */
+ function abort() {
+ var event,
+ bench = this,
+ resetting = calledBy.reset;
+
+ if (bench.running) {
+ event = Event('abort');
+ bench.emit(event);
+ if (!event.cancelled || resetting) {
+ // Avoid infinite recursion.
+ calledBy.abort = true;
+ bench.reset();
+ delete calledBy.abort;
+
+ if (support.timeout) {
+ clearTimeout(bench._timerId);
+ delete bench._timerId;
+ }
+ if (!resetting) {
+ bench.aborted = true;
+ bench.running = false;
+ }
+ }
+ }
+ return bench;
+ }
+
+ /**
+ * Creates a new benchmark using the same test and options.
+ *
+ * @memberOf Benchmark
+ * @param {Object} options Options object to overwrite cloned options.
+ * @returns {Object} The new benchmark instance.
+ * @example
+ *
+ * var bizarro = bench.clone({
+ * 'name': 'doppelganger'
+ * });
+ */
+ function clone(options) {
+ var bench = this,
+ result = new bench.constructor(_.assign({}, bench, options));
+
+ // Correct the `options` object.
+ result.options = _.assign({}, cloneDeep(bench.options), cloneDeep(options));
+
+ // Copy own custom properties.
+ _.forOwn(bench, function(value, key) {
+ if (!_.has(result, key)) {
+ result[key] = cloneDeep(value);
+ }
+ });
+
+ return result;
+ }
+
+ /**
+ * Determines if a benchmark is faster than another.
+ *
+ * @memberOf Benchmark
+ * @param {Object} other The benchmark to compare.
+ * @returns {number} Returns `-1` if slower, `1` if faster, and `0` if indeterminate.
+ */
+ function compare(other) {
+ var bench = this;
+
+ // Exit early if comparing the same benchmark.
+ if (bench == other) {
+ return 0;
+ }
+ var critical,
+ zStat,
+ sample1 = bench.stats.sample,
+ sample2 = other.stats.sample,
+ size1 = sample1.length,
+ size2 = sample2.length,
+ maxSize = max(size1, size2),
+ minSize = min(size1, size2),
+ u1 = getU(sample1, sample2),
+ u2 = getU(sample2, sample1),
+ u = min(u1, u2);
+
+ function getScore(xA, sampleB) {
+ return _.reduce(sampleB, function(total, xB) {
+ return total + (xB > xA ? 0 : xB < xA ? 1 : 0.5);
+ }, 0);
+ }
+
+ function getU(sampleA, sampleB) {
+ return _.reduce(sampleA, function(total, xA) {
+ return total + getScore(xA, sampleB);
+ }, 0);
+ }
+
+ function getZ(u) {
+ return (u - ((size1 * size2) / 2)) / sqrt((size1 * size2 * (size1 + size2 + 1)) / 12);
+ }
+ // Reject the null hypothesis the two samples come from the
+ // same population (i.e. have the same median) if...
+ if (size1 + size2 > 30) {
+ // ...the z-stat is greater than 1.96 or less than -1.96
+ // http://www.statisticslectures.com/topics/mannwhitneyu/
+ zStat = getZ(u);
+ return abs(zStat) > 1.96 ? (u == u1 ? 1 : -1) : 0;
+ }
+ // ...the U value is less than or equal the critical U value.
+ critical = maxSize < 5 || minSize < 3 ? 0 : uTable[maxSize][minSize - 3];
+ return u <= critical ? (u == u1 ? 1 : -1) : 0;
+ }
+
+ /**
+ * Reset properties and abort if running.
+ *
+ * @memberOf Benchmark
+ * @returns {Object} The benchmark instance.
+ */
+ function reset() {
+ var bench = this;
+ if (bench.running && !calledBy.abort) {
+ // No worries, `reset()` is called within `abort()`.
+ calledBy.reset = true;
+ bench.abort();
+ delete calledBy.reset;
+ return bench;
+ }
+ var event,
+ index = 0,
+ changes = [],
+ queue = [];
+
+ // A non-recursive solution to check if properties have changed.
+ // For more information see http://www.jslab.dk/articles/non.recursive.preorder.traversal.part4.
+ var data = {
+ 'destination': bench,
+ 'source': _.assign({}, cloneDeep(bench.constructor.prototype), cloneDeep(bench.options))
+ };
+
+ do {
+ _.forOwn(data.source, function(value, key) {
+ var changed,
+ destination = data.destination,
+ currValue = destination[key];
+
+ // Skip pseudo private properties like `_timerId` which could be a
+ // Java object in environments like RingoJS.
+ if (key.charAt(0) == '_') {
+ return;
+ }
+ if (value && typeof value == 'object') {
+ if (_.isArray(value)) {
+ // Check if an array value has changed to a non-array value.
+ if (!_.isArray(currValue)) {
+ changed = currValue = [];
+ }
+ // Check if an array has changed its length.
+ if (currValue.length != value.length) {
+ changed = currValue = currValue.slice(0, value.length);
+ currValue.length = value.length;
+ }
+ }
+ // Check if an object has changed to a non-object value.
+ else if (!currValue || typeof currValue != 'object') {
+ changed = currValue = {};
+ }
+ // Register a changed object.
+ if (changed) {
+ changes.push({ 'destination': destination, 'key': key, 'value': currValue });
+ }
+ queue.push({ 'destination': currValue, 'source': value });
+ }
+ // Register a changed primitive.
+ else if (value !== currValue && !(value == null || _.isFunction(value))) {
+ changes.push({ 'destination': destination, 'key': key, 'value': value });
+ }
+ });
+ }
+ while ((data = queue[index++]));
+
+ // If changed emit the `reset` event and if it isn't cancelled reset the benchmark.
+ if (changes.length && (bench.emit(event = Event('reset')), !event.cancelled)) {
+ _.each(changes, function(data) {
+ data.destination[data.key] = data.value;
+ });
+ }
+ return bench;
+ }
+
+ /**
+ * Displays relevant benchmark information when coerced to a string.
+ *
+ * @name toString
+ * @memberOf Benchmark
+ * @returns {string} A string representation of the benchmark instance.
+ */
+ function toStringBench() {
+ var bench = this,
+ error = bench.error,
+ hz = bench.hz,
+ id = bench.id,
+ stats = bench.stats,
+ size = stats.sample.length,
+ pm = '\xb1',
+ result = bench.name || (_.isNaN(id) ? id : '<Test #' + id + '>');
+
+ if (error) {
+ result += ': ' + join(error);
+ } else {
+ result += ' x ' + formatNumber(hz.toFixed(hz < 100 ? 2 : 0)) + ' ops/sec ' + pm +
+ stats.rme.toFixed(2) + '% (' + size + ' run' + (size == 1 ? '' : 's') + ' sampled)';
+ }
+ return result;
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Clocks the time taken to execute a test per cycle (secs).
+ *
+ * @private
+ * @param {Object} bench The benchmark instance.
+ * @returns {number} The time taken.
+ */
+ function clock() {
+ var options = Benchmark.options,
+ templateData = {},
+ timers = [{ 'ns': timer.ns, 'res': max(0.0015, getRes('ms')), 'unit': 'ms' }];
+
+ // Lazy define for hi-res timers.
+ clock = function(clone) {
+ var deferred;
+
+ if (clone instanceof Deferred) {
+ deferred = clone;
+ clone = deferred.benchmark;
+ }
+ var bench = clone._original,
+ stringable = isStringable(bench.fn),
+ count = bench.count = clone.count,
+ decompilable = stringable || (support.decompilation && (clone.setup !== _.noop || clone.teardown !== _.noop)),
+ id = bench.id,
+ name = bench.name || (typeof id == 'number' ? '<Test #' + id + '>' : id),
+ result = 0;
+
+ // Init `minTime` if needed.
+ clone.minTime = bench.minTime || (bench.minTime = bench.options.minTime = options.minTime);
+
+ // Compile in setup/teardown functions and the test loop.
+ // Create a new compiled test, instead of using the cached `bench.compiled`,
+ // to avoid potential engine optimizations enabled over the life of the test.
+ var funcBody = deferred
+ ? 'var d#=this,${fnArg}=d#,m#=d#.benchmark._original,f#=m#.fn,su#=m#.setup,td#=m#.teardown;' +
+ // When `deferred.cycles` is `0` then...
+ 'if(!d#.cycles){' +
+ // set `deferred.fn`,
+ 'd#.fn=function(){var ${fnArg}=d#;if(typeof f#=="function"){try{${fn}\n}catch(e#){f#(d#)}}else{${fn}\n}};' +
+ // set `deferred.teardown`,
+ 'd#.teardown=function(){d#.cycles=0;if(typeof td#=="function"){try{${teardown}\n}catch(e#){td#()}}else{${teardown}\n}};' +
+ // execute the benchmark's `setup`,
+ 'if(typeof su#=="function"){try{${setup}\n}catch(e#){su#()}}else{${setup}\n};' +
+ // start timer,
+ 't#.start(d#);' +
+ // and then execute `deferred.fn` and return a dummy object.
+ '}d#.fn();return{uid:"${uid}"}'
+
+ : 'var r#,s#,m#=this,f#=m#.fn,i#=m#.count,n#=t#.ns;${setup}\n${begin};' +
+ 'while(i#--){${fn}\n}${end};${teardown}\nreturn{elapsed:r#,uid:"${uid}"}';
+
+ var compiled = bench.compiled = clone.compiled = createCompiled(bench, decompilable, deferred, funcBody),
+ isEmpty = !(templateData.fn || stringable);
+
+ try {
+ if (isEmpty) {
+ // Firefox may remove dead code from `Function#toString` results.
+ // For more information see http://bugzil.la/536085.
+ throw new Error('The test "' + name + '" is empty. This may be the result of dead code removal.');
+ }
+ else if (!deferred) {
+ // Pretest to determine if compiled code exits early, usually by a
+ // rogue `return` statement, by checking for a return object with the uid.
+ bench.count = 1;
+ compiled = decompilable && (compiled.call(bench, context, timer) || {}).uid == templateData.uid && compiled;
+ bench.count = count;
+ }
+ } catch(e) {
+ compiled = null;
+ clone.error = e || new Error(String(e));
+ bench.count = count;
+ }
+ // Fallback when a test exits early or errors during pretest.
+ if (!compiled && !deferred && !isEmpty) {
+ funcBody = (
+ stringable || (decompilable && !clone.error)
+ ? 'function f#(){${fn}\n}var r#,s#,m#=this,i#=m#.count'
+ : 'var r#,s#,m#=this,f#=m#.fn,i#=m#.count'
+ ) +
+ ',n#=t#.ns;${setup}\n${begin};m#.f#=f#;while(i#--){m#.f#()}${end};' +
+ 'delete m#.f#;${teardown}\nreturn{elapsed:r#}';
+
+ compiled = createCompiled(bench, decompilable, deferred, funcBody);
+
+ try {
+ // Pretest one more time to check for errors.
+ bench.count = 1;
+ compiled.call(bench, context, timer);
+ bench.count = count;
+ delete clone.error;
+ }
+ catch(e) {
+ bench.count = count;
+ if (!clone.error) {
+ clone.error = e || new Error(String(e));
+ }
+ }
+ }
+ // If no errors run the full test loop.
+ if (!clone.error) {
+ compiled = bench.compiled = clone.compiled = createCompiled(bench, decompilable, deferred, funcBody);
+ result = compiled.call(deferred || bench, context, timer).elapsed;
+ }
+ return result;
+ };
+
+ /*----------------------------------------------------------------------*/
+
+ /**
+ * Creates a compiled function from the given function `body`.
+ */
+ function createCompiled(bench, decompilable, deferred, body) {
+ var fn = bench.fn,
+ fnArg = deferred ? getFirstArgument(fn) || 'deferred' : '';
+
+ templateData.uid = uid + uidCounter++;
+
+ _.assign(templateData, {
+ 'setup': decompilable ? getSource(bench.setup) : interpolate('m#.setup()'),
+ 'fn': decompilable ? getSource(fn) : interpolate('m#.fn(' + fnArg + ')'),
+ 'fnArg': fnArg,
+ 'teardown': decompilable ? getSource(bench.teardown) : interpolate('m#.teardown()')
+ });
+
+ // Use API of chosen timer.
+ if (timer.unit == 'ns') {
+ _.assign(templateData, {
+ 'begin': interpolate('s#=n#()'),
+ 'end': interpolate('r#=n#(s#);r#=r#[0]+(r#[1]/1e9)')
+ });
+ }
+ else if (timer.unit == 'us') {
+ if (timer.ns.stop) {
+ _.assign(templateData, {
+ 'begin': interpolate('s#=n#.start()'),
+ 'end': interpolate('r#=n#.microseconds()/1e6')
+ });
+ } else {
+ _.assign(templateData, {
+ 'begin': interpolate('s#=n#()'),
+ 'end': interpolate('r#=(n#()-s#)/1e6')
+ });
+ }
+ }
+ else if (timer.ns.now) {
+ _.assign(templateData, {
+ 'begin': interpolate('s#=n#.now()'),
+ 'end': interpolate('r#=(n#.now()-s#)/1e3')
+ });
+ }
+ else {
+ _.assign(templateData, {
+ 'begin': interpolate('s#=new n#().getTime()'),
+ 'end': interpolate('r#=(new n#().getTime()-s#)/1e3')
+ });
+ }
+ // Define `timer` methods.
+ timer.start = createFunction(
+ interpolate('o#'),
+ interpolate('var n#=this.ns,${begin};o#.elapsed=0;o#.timeStamp=s#')
+ );
+
+ timer.stop = createFunction(
+ interpolate('o#'),
+ interpolate('var n#=this.ns,s#=o#.timeStamp,${end};o#.elapsed=r#')
+ );
+
+ // Create compiled test.
+ return createFunction(
+ interpolate('window,t#'),
+ 'var global = window, clearTimeout = global.clearTimeout, setTimeout = global.setTimeout;\n' +
+ interpolate(body)
+ );
+ }
+
+ /**
+ * Gets the current timer's minimum resolution (secs).
+ */
+ function getRes(unit) {
+ var measured,
+ begin,
+ count = 30,
+ divisor = 1e3,
+ ns = timer.ns,
+ sample = [];
+
+ // Get average smallest measurable time.
+ while (count--) {
+ if (unit == 'us') {
+ divisor = 1e6;
+ if (ns.stop) {
+ ns.start();
+ while (!(measured = ns.microseconds())) {}
+ } else {
+ begin = ns();
+ while (!(measured = ns() - begin)) {}
+ }
+ }
+ else if (unit == 'ns') {
+ divisor = 1e9;
+ begin = (begin = ns())[0] + (begin[1] / divisor);
+ while (!(measured = ((measured = ns())[0] + (measured[1] / divisor)) - begin)) {}
+ divisor = 1;
+ }
+ else if (ns.now) {
+ begin = ns.now();
+ while (!(measured = ns.now() - begin)) {}
+ }
+ else {
+ begin = new ns().getTime();
+ while (!(measured = new ns().getTime() - begin)) {}
+ }
+ // Check for broken timers.
+ if (measured > 0) {
+ sample.push(measured);
+ } else {
+ sample.push(Infinity);
+ break;
+ }
+ }
+ // Convert to seconds.
+ return getMean(sample) / divisor;
+ }
+
+ /**
+ * Interpolates a given template string.
+ */
+ function interpolate(string) {
+ // Replaces all occurrences of `#` with a unique number and template tokens with content.
+ return _.template(string.replace(/\#/g, /\d+/.exec(templateData.uid)))(templateData);
+ }
+
+ /*----------------------------------------------------------------------*/
+
+ // Detect Chrome's microsecond timer:
+ // enable benchmarking via the --enable-benchmarking command
+ // line switch in at least Chrome 7 to use chrome.Interval
+ try {
+ if ((timer.ns = new (context.chrome || context.chromium).Interval)) {
+ timers.push({ 'ns': timer.ns, 'res': getRes('us'), 'unit': 'us' });
+ }
+ } catch(e) {}
+
+ // Detect Node.js's nanosecond resolution timer available in Node.js >= 0.8.
+ if (processObject && typeof (timer.ns = processObject.hrtime) == 'function') {
+ timers.push({ 'ns': timer.ns, 'res': getRes('ns'), 'unit': 'ns' });
+ }
+ // Detect Wade Simmons' Node.js `microtime` module.
+ if (microtimeObject && typeof (timer.ns = microtimeObject.now) == 'function') {
+ timers.push({ 'ns': timer.ns, 'res': getRes('us'), 'unit': 'us' });
+ }
+ // Pick timer with highest resolution.
+ timer = (_.minBy || _.min)(timers, 'res');
+
+ // Error if there are no working timers.
+ if (timer.res == Infinity) {
+ throw new Error('Benchmark.js was unable to find a working timer.');
+ }
+ // Resolve time span required to achieve a percent uncertainty of at most 1%.
+ // For more information see http://spiff.rit.edu/classes/phys273/uncert/uncert.html.
+ options.minTime || (options.minTime = max(timer.res / 2 / 0.01, 0.05));
+ return clock.apply(null, arguments);
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Computes stats on benchmark results.
+ *
+ * @private
+ * @param {Object} bench The benchmark instance.
+ * @param {Object} options The options object.
+ */
+ function compute(bench, options) {
+ options || (options = {});
+
+ var async = options.async,
+ elapsed = 0,
+ initCount = bench.initCount,
+ minSamples = bench.minSamples,
+ queue = [],
+ sample = bench.stats.sample;
+
+ /**
+ * Adds a clone to the queue.
+ */
+ function enqueue() {
+ queue.push(bench.clone({
+ '_original': bench,
+ 'events': {
+ 'abort': [update],
+ 'cycle': [update],
+ 'error': [update],
+ 'start': [update]
+ }
+ }));
+ }
+
+ /**
+ * Updates the clone/original benchmarks to keep their data in sync.
+ */
+ function update(event) {
+ var clone = this,
+ type = event.type;
+
+ if (bench.running) {
+ if (type == 'start') {
+ // Note: `clone.minTime` prop is inited in `clock()`.
+ clone.count = bench.initCount;
+ }
+ else {
+ if (type == 'error') {
+ bench.error = clone.error;
+ }
+ if (type == 'abort') {
+ bench.abort();
+ bench.emit('cycle');
+ } else {
+ event.currentTarget = event.target = bench;
+ bench.emit(event);
+ }
+ }
+ } else if (bench.aborted) {
+ // Clear abort listeners to avoid triggering bench's abort/cycle again.
+ clone.events.abort.length = 0;
+ clone.abort();
+ }
+ }
+
+ /**
+ * Determines if more clones should be queued or if cycling should stop.
+ */
+ function evaluate(event) {
+ var critical,
+ df,
+ mean,
+ moe,
+ rme,
+ sd,
+ sem,
+ variance,
+ clone = event.target,
+ done = bench.aborted,
+ now = _.now(),
+ size = sample.push(clone.times.period),
+ maxedOut = size >= minSamples && (elapsed += now - clone.times.timeStamp) / 1e3 > bench.maxTime,
+ times = bench.times,
+ varOf = function(sum, x) { return sum + pow(x - mean, 2); };
+
+ // Exit early for aborted or unclockable tests.
+ if (done || clone.hz == Infinity) {
+ maxedOut = !(size = sample.length = queue.length = 0);
+ }
+
+ if (!done) {
+ // Compute the sample mean (estimate of the population mean).
+ mean = getMean(sample);
+ // Compute the sample variance (estimate of the population variance).
+ variance = _.reduce(sample, varOf, 0) / (size - 1) || 0;
+ // Compute the sample standard deviation (estimate of the population standard deviation).
+ sd = sqrt(variance);
+ // Compute the standard error of the mean (a.k.a. the standard deviation of the sampling distribution of the sample mean).
+ sem = sd / sqrt(size);
+ // Compute the degrees of freedom.
+ df = size - 1;
+ // Compute the critical value.
+ critical = tTable[Math.round(df) || 1] || tTable.infinity;
+ // Compute the margin of error.
+ moe = sem * critical;
+ // Compute the relative margin of error.
+ rme = (moe / mean) * 100 || 0;
+
+ _.assign(bench.stats, {
+ 'deviation': sd,
+ 'mean': mean,
+ 'moe': moe,
+ 'rme': rme,
+ 'sem': sem,
+ 'variance': variance
+ });
+
+ // Abort the cycle loop when the minimum sample size has been collected
+ // and the elapsed time exceeds the maximum time allowed per benchmark.
+ // We don't count cycle delays toward the max time because delays may be
+ // increased by browsers that clamp timeouts for inactive tabs. For more
+ // information see https://developer.mozilla.org/en/window.setTimeout#Inactive_tabs.
+ if (maxedOut) {
+ // Reset the `initCount` in case the benchmark is rerun.
+ bench.initCount = initCount;
+ bench.running = false;
+ done = true;
+ times.elapsed = (now - times.timeStamp) / 1e3;
+ }
+ if (bench.hz != Infinity) {
+ bench.hz = 1 / mean;
+ times.cycle = mean * bench.count;
+ times.period = mean;
+ }
+ }
+ // If time permits, increase sample size to reduce the margin of error.
+ if (queue.length < 2 && !maxedOut) {
+ enqueue();
+ }
+ // Abort the `invoke` cycle when done.
+ event.aborted = done;
+ }
+
+ // Init queue and begin.
+ enqueue();
+ invoke(queue, {
+ 'name': 'run',
+ 'args': { 'async': async },
+ 'queued': true,
+ 'onCycle': evaluate,
+ 'onComplete': function() { bench.emit('complete'); }
+ });
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Cycles a benchmark until a run `count` can be established.
+ *
+ * @private
+ * @param {Object} clone The cloned benchmark instance.
+ * @param {Object} options The options object.
+ */
+ function cycle(clone, options) {
+ options || (options = {});
+
+ var deferred;
+ if (clone instanceof Deferred) {
+ deferred = clone;
+ clone = clone.benchmark;
+ }
+ var clocked,
+ cycles,
+ divisor,
+ event,
+ minTime,
+ period,
+ async = options.async,
+ bench = clone._original,
+ count = clone.count,
+ times = clone.times;
+
+ // Continue, if not aborted between cycles.
+ if (clone.running) {
+ // `minTime` is set to `Benchmark.options.minTime` in `clock()`.
+ cycles = ++clone.cycles;
+ clocked = deferred ? deferred.elapsed : clock(clone);
+ minTime = clone.minTime;
+
+ if (cycles > bench.cycles) {
+ bench.cycles = cycles;
+ }
+ if (clone.error) {
+ event = Event('error');
+ event.message = clone.error;
+ clone.emit(event);
+ if (!event.cancelled) {
+ clone.abort();
+ }
+ }
+ }
+ // Continue, if not errored.
+ if (clone.running) {
+ // Compute the time taken to complete last test cycle.
+ bench.times.cycle = times.cycle = clocked;
+ // Compute the seconds per operation.
+ period = bench.times.period = times.period = clocked / count;
+ // Compute the ops per second.
+ bench.hz = clone.hz = 1 / period;
+ // Avoid working our way up to this next time.
+ bench.initCount = clone.initCount = count;
+ // Do we need to do another cycle?
+ clone.running = clocked < minTime;
+
+ if (clone.running) {
+ // Tests may clock at `0` when `initCount` is a small number,
+ // to avoid that we set its count to something a bit higher.
+ if (!clocked && (divisor = divisors[clone.cycles]) != null) {
+ count = floor(4e6 / divisor);
+ }
+ // Calculate how many more iterations it will take to achieve the `minTime`.
+ if (count <= clone.count) {
+ count += Math.ceil((minTime - clocked) / period);
+ }
+ clone.running = count != Infinity;
+ }
+ }
+ // Should we exit early?
+ event = Event('cycle');
+ clone.emit(event);
+ if (event.aborted) {
+ clone.abort();
+ }
+ // Figure out what to do next.
+ if (clone.running) {
+ // Start a new cycle.
+ clone.count = count;
+ if (deferred) {
+ clone.compiled.call(deferred, context, timer);
+ } else if (async) {
+ delay(clone, function() { cycle(clone, options); });
+ } else {
+ cycle(clone);
+ }
+ }
+ else {
+ // Fix TraceMonkey bug associated with clock fallbacks.
+ // For more information see http://bugzil.la/509069.
+ if (support.browser) {
+ runScript(uid + '=1;delete ' + uid);
+ }
+ // We're done.
+ clone.emit('complete');
+ }
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * Runs the benchmark.
+ *
+ * @memberOf Benchmark
+ * @param {Object} [options={}] Options object.
+ * @returns {Object} The benchmark instance.
+ * @example
+ *
+ * // basic usage
+ * bench.run();
+ *
+ * // or with options
+ * bench.run({ 'async': true });
+ */
+ function run(options) {
+ var bench = this,
+ event = Event('start');
+
+ // Set `running` to `false` so `reset()` won't call `abort()`.
+ bench.running = false;
+ bench.reset();
+ bench.running = true;
+
+ bench.count = bench.initCount;
+ bench.times.timeStamp = _.now();
+ bench.emit(event);
+
+ if (!event.cancelled) {
+ options = { 'async': ((options = options && options.async) == null ? bench.async : options) && support.timeout };
+
+ // For clones created within `compute()`.
+ if (bench._original) {
+ if (bench.defer) {
+ Deferred(bench);
+ } else {
+ cycle(bench, options);
+ }
+ }
+ // For original benchmarks.
+ else {
+ compute(bench, options);
+ }
+ }
+ return bench;
+ }
+
+ /*------------------------------------------------------------------------*/
+
+ // Firefox 1 erroneously defines variable and argument names of functions on
+ // the function itself as non-configurable properties with `undefined` values.
+ // The bugginess continues as the `Benchmark` constructor has an argument
+ // named `options` and Firefox 1 will not assign a value to `Benchmark.options`,
+ // making it non-writable in the process, unless it is the first property
+ // assigned by for-in loop of `_.assign()`.
+ _.assign(Benchmark, {
+
+ /**
+ * The default options copied by benchmark instances.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @type Object
+ */
+ 'options': {
+
+ /**
+ * A flag to indicate that benchmark cycles will execute asynchronously
+ * by default.
+ *
+ * @memberOf Benchmark.options
+ * @type boolean
+ */
+ 'async': false,
+
+ /**
+ * A flag to indicate that the benchmark clock is deferred.
+ *
+ * @memberOf Benchmark.options
+ * @type boolean
+ */
+ 'defer': false,
+
+ /**
+ * The delay between test cycles (secs).
+ * @memberOf Benchmark.options
+ * @type number
+ */
+ 'delay': 0.005,
+
+ /**
+ * Displayed by `Benchmark#toString` when a `name` is not available
+ * (auto-generated if absent).
+ *
+ * @memberOf Benchmark.options
+ * @type string
+ */
+ 'id': undefined,
+
+ /**
+ * The default number of times to execute a test on a benchmark's first cycle.
+ *
+ * @memberOf Benchmark.options
+ * @type number
+ */
+ 'initCount': 1,
+
+ /**
+ * The maximum time a benchmark is allowed to run before finishing (secs).
+ *
+ * Note: Cycle delays aren't counted toward the maximum time.
+ *
+ * @memberOf Benchmark.options
+ * @type number
+ */
+ 'maxTime': 5,
+
+ /**
+ * The minimum sample size required to perform statistical analysis.
+ *
+ * @memberOf Benchmark.options
+ * @type number
+ */
+ 'minSamples': 5,
+
+ /**
+ * The time needed to reduce the percent uncertainty of measurement to 1% (secs).
+ *
+ * @memberOf Benchmark.options
+ * @type number
+ */
+ 'minTime': 0,
+
+ /**
+ * The name of the benchmark.
+ *
+ * @memberOf Benchmark.options
+ * @type string
+ */
+ 'name': undefined,
+
+ /**
+ * An event listener called when the benchmark is aborted.
+ *
+ * @memberOf Benchmark.options
+ * @type Function
+ */
+ 'onAbort': undefined,
+
+ /**
+ * An event listener called when the benchmark completes running.
+ *
+ * @memberOf Benchmark.options
+ * @type Function
+ */
+ 'onComplete': undefined,
+
+ /**
+ * An event listener called after each run cycle.
+ *
+ * @memberOf Benchmark.options
+ * @type Function
+ */
+ 'onCycle': undefined,
+
+ /**
+ * An event listener called when a test errors.
+ *
+ * @memberOf Benchmark.options
+ * @type Function
+ */
+ 'onError': undefined,
+
+ /**
+ * An event listener called when the benchmark is reset.
+ *
+ * @memberOf Benchmark.options
+ * @type Function
+ */
+ 'onReset': undefined,
+
+ /**
+ * An event listener called when the benchmark starts running.
+ *
+ * @memberOf Benchmark.options
+ * @type Function
+ */
+ 'onStart': undefined
+ },
+
+ /**
+ * Platform object with properties describing things like browser name,
+ * version, and operating system. See [`platform.js`](http://mths.be/platform).
+ *
+ * @static
+ * @memberOf Benchmark
+ * @type Object
+ */
+ 'platform': context.platform || req('platform') || ({
+ 'description': context.navigator && context.navigator.userAgent || null,
+ 'layout': null,
+ 'product': null,
+ 'name': null,
+ 'manufacturer': null,
+ 'os': null,
+ 'prerelease': null,
+ 'version': null,
+ 'toString': function() {
+ return this.description || '';
+ }
+ }),
+
+ /**
+ * The semantic version number.
+ *
+ * @static
+ * @memberOf Benchmark
+ * @type string
+ */
+ 'version': '2.0.0'
+ });
+
+ _.assign(Benchmark, {
+ 'filter': filter,
+ 'formatNumber': formatNumber,
+ 'invoke': invoke,
+ 'join': join,
+ 'runInContext': runInContext,
+ 'support': support
+ });
+
+ // Add lodash methods to Benchmark.
+ _.each(['each', 'forEach', 'forOwn', 'has', 'indexOf', 'map', 'reduce'], function(methodName) {
+ Benchmark[methodName] = _[methodName];
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ _.assign(Benchmark.prototype, {
+
+ /**
+ * The number of times a test was executed.
+ *
+ * @memberOf Benchmark
+ * @type number
+ */
+ 'count': 0,
+
+ /**
+ * The number of cycles performed while benchmarking.
+ *
+ * @memberOf Benchmark
+ * @type number
+ */
+ 'cycles': 0,
+
+ /**
+ * The number of executions per second.
+ *
+ * @memberOf Benchmark
+ * @type number
+ */
+ 'hz': 0,
+
+ /**
+ * The compiled test function.
+ *
+ * @memberOf Benchmark
+ * @type {Function|string}
+ */
+ 'compiled': undefined,
+
+ /**
+ * The error object if the test failed.
+ *
+ * @memberOf Benchmark
+ * @type Object
+ */
+ 'error': undefined,
+
+ /**
+ * The test to benchmark.
+ *
+ * @memberOf Benchmark
+ * @type {Function|string}
+ */
+ 'fn': undefined,
+
+ /**
+ * A flag to indicate if the benchmark is aborted.
+ *
+ * @memberOf Benchmark
+ * @type boolean
+ */
+ 'aborted': false,
+
+ /**
+ * A flag to indicate if the benchmark is running.
+ *
+ * @memberOf Benchmark
+ * @type boolean
+ */
+ 'running': false,
+
+ /**
+ * Compiled into the test and executed immediately **before** the test loop.
+ *
+ * @memberOf Benchmark
+ * @type {Function|string}
+ * @example
+ *
+ * // basic usage
+ * var bench = Benchmark({
+ * 'setup': function() {
+ * var c = this.count,
+ * element = document.getElementById('container');
+ * while (c--) {
+ * element.appendChild(document.createElement('div'));
+ * }
+ * },
+ * 'fn': function() {
+ * element.removeChild(element.lastChild);
+ * }
+ * });
+ *
+ * // compiles to something like:
+ * var c = this.count,
+ * element = document.getElementById('container');
+ * while (c--) {
+ * element.appendChild(document.createElement('div'));
+ * }
+ * var start = new Date;
+ * while (count--) {
+ * element.removeChild(element.lastChild);
+ * }
+ * var end = new Date - start;
+ *
+ * // or using strings
+ * var bench = Benchmark({
+ * 'setup': '\
+ * var a = 0;\n\
+ * (function() {\n\
+ * (function() {\n\
+ * (function() {',
+ * 'fn': 'a += 1;',
+ * 'teardown': '\
+ * }())\n\
+ * }())\n\
+ * }())'
+ * });
+ *
+ * // compiles to something like:
+ * var a = 0;
+ * (function() {
+ * (function() {
+ * (function() {
+ * var start = new Date;
+ * while (count--) {
+ * a += 1;
+ * }
+ * var end = new Date - start;
+ * }())
+ * }())
+ * }())
+ */
+ 'setup': _.noop,
+
+ /**
+ * Compiled into the test and executed immediately **after** the test loop.
+ *
+ * @memberOf Benchmark
+ * @type {Function|string}
+ */
+ 'teardown': _.noop,
+
+ /**
+ * An object of stats including mean, margin or error, and standard deviation.
+ *
+ * @memberOf Benchmark
+ * @type Object
+ */
+ 'stats': {
+
+ /**
+ * The margin of error.
+ *
+ * @memberOf Benchmark#stats
+ * @type number
+ */
+ 'moe': 0,
+
+ /**
+ * The relative margin of error (expressed as a percentage of the mean).
+ *
+ * @memberOf Benchmark#stats
+ * @type number
+ */
+ 'rme': 0,
+
+ /**
+ * The standard error of the mean.
+ *
+ * @memberOf Benchmark#stats
+ * @type number
+ */
+ 'sem': 0,
+
+ /**
+ * The sample standard deviation.
+ *
+ * @memberOf Benchmark#stats
+ * @type number
+ */
+ 'deviation': 0,
+
+ /**
+ * The sample arithmetic mean (secs).
+ *
+ * @memberOf Benchmark#stats
+ * @type number
+ */
+ 'mean': 0,
+
+ /**
+ * The array of sampled periods.
+ *
+ * @memberOf Benchmark#stats
+ * @type Array
+ */
+ 'sample': [],
+
+ /**
+ * The sample variance.
+ *
+ * @memberOf Benchmark#stats
+ * @type number
+ */
+ 'variance': 0
+ },
+
+ /**
+ * An object of timing data including cycle, elapsed, period, start, and stop.
+ *
+ * @memberOf Benchmark
+ * @type Object
+ */
+ 'times': {
+
+ /**
+ * The time taken to complete the last cycle (secs).
+ *
+ * @memberOf Benchmark#times
+ * @type number
+ */
+ 'cycle': 0,
+
+ /**
+ * The time taken to complete the benchmark (secs).
+ *
+ * @memberOf Benchmark#times
+ * @type number
+ */
+ 'elapsed': 0,
+
+ /**
+ * The time taken to execute the test once (secs).
+ *
+ * @memberOf Benchmark#times
+ * @type number
+ */
+ 'period': 0,
+
+ /**
+ * A timestamp of when the benchmark started (ms).
+ *
+ * @memberOf Benchmark#times
+ * @type number
+ */
+ 'timeStamp': 0
+ }
+ });
+
+ _.assign(Benchmark.prototype, {
+ 'abort': abort,
+ 'clone': clone,
+ 'compare': compare,
+ 'emit': emit,
+ 'listeners': listeners,
+ 'off': off,
+ 'on': on,
+ 'reset': reset,
+ 'run': run,
+ 'toString': toStringBench
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ _.assign(Deferred.prototype, {
+
+ /**
+ * The deferred benchmark instance.
+ *
+ * @memberOf Benchmark.Deferred
+ * @type Object
+ */
+ 'benchmark': null,
+
+ /**
+ * The number of deferred cycles performed while benchmarking.
+ *
+ * @memberOf Benchmark.Deferred
+ * @type number
+ */
+ 'cycles': 0,
+
+ /**
+ * The time taken to complete the deferred benchmark (secs).
+ *
+ * @memberOf Benchmark.Deferred
+ * @type number
+ */
+ 'elapsed': 0,
+
+ /**
+ * A timestamp of when the deferred benchmark started (ms).
+ *
+ * @memberOf Benchmark.Deferred
+ * @type number
+ */
+ 'timeStamp': 0
+ });
+
+ _.assign(Deferred.prototype, {
+ 'resolve': resolve
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ _.assign(Event.prototype, {
+
+ /**
+ * A flag to indicate if the emitters listener iteration is aborted.
+ *
+ * @memberOf Benchmark.Event
+ * @type boolean
+ */
+ 'aborted': false,
+
+ /**
+ * A flag to indicate if the default action is cancelled.
+ *
+ * @memberOf Benchmark.Event
+ * @type boolean
+ */
+ 'cancelled': false,
+
+ /**
+ * The object whose listeners are currently being processed.
+ *
+ * @memberOf Benchmark.Event
+ * @type Object
+ */
+ 'currentTarget': undefined,
+
+ /**
+ * The return value of the last executed listener.
+ *
+ * @memberOf Benchmark.Event
+ * @type Mixed
+ */
+ 'result': undefined,
+
+ /**
+ * The object to which the event was originally emitted.
+ *
+ * @memberOf Benchmark.Event
+ * @type Object
+ */
+ 'target': undefined,
+
+ /**
+ * A timestamp of when the event was created (ms).
+ *
+ * @memberOf Benchmark.Event
+ * @type number
+ */
+ 'timeStamp': 0,
+
+ /**
+ * The event type.
+ *
+ * @memberOf Benchmark.Event
+ * @type string
+ */
+ 'type': ''
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ /**
+ * The default options copied by suite instances.
+ *
+ * @static
+ * @memberOf Benchmark.Suite
+ * @type Object
+ */
+ Suite.options = {
+
+ /**
+ * The name of the suite.
+ *
+ * @memberOf Benchmark.Suite.options
+ * @type string
+ */
+ 'name': undefined
+ };
+
+ /*------------------------------------------------------------------------*/
+
+ _.assign(Suite.prototype, {
+
+ /**
+ * The number of benchmarks in the suite.
+ *
+ * @memberOf Benchmark.Suite
+ * @type number
+ */
+ 'length': 0,
+
+ /**
+ * A flag to indicate if the suite is aborted.
+ *
+ * @memberOf Benchmark.Suite
+ * @type boolean
+ */
+ 'aborted': false,
+
+ /**
+ * A flag to indicate if the suite is running.
+ *
+ * @memberOf Benchmark.Suite
+ * @type boolean
+ */
+ 'running': false
+ });
+
+ _.assign(Suite.prototype, {
+ 'abort': abortSuite,
+ 'add': add,
+ 'clone': cloneSuite,
+ 'emit': emit,
+ 'filter': filterSuite,
+ 'join': arrayRef.join,
+ 'listeners': listeners,
+ 'off': off,
+ 'on': on,
+ 'pop': arrayRef.pop,
+ 'push': push,
+ 'reset': resetSuite,
+ 'run': runSuite,
+ 'reverse': arrayRef.reverse,
+ 'shift': shift,
+ 'slice': slice,
+ 'sort': arrayRef.sort,
+ 'splice': arrayRef.splice,
+ 'unshift': unshift
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ // Expose Deferred, Event, and Suite.
+ _.assign(Benchmark, {
+ 'Deferred': Deferred,
+ 'Event': Event,
+ 'Suite': Suite
+ });
+
+ /*------------------------------------------------------------------------*/
+
+ // Add lodash methods as Suite methods.
+ _.each(['each', 'forEach', 'indexOf', 'map', 'reduce'], function(methodName) {
+ var func = _[methodName];
+ Suite.prototype[methodName] = function() {
+ var args = [this];
+ push.apply(args, arguments);
+ return func.apply(_, args);
+ };
+ });
+
+ // Avoid array-like object bugs with `Array#shift` and `Array#splice`
+ // in Firefox < 10 and IE < 9.
+ _.each(['pop', 'shift', 'splice'], function(methodName) {
+ var func = arrayRef[methodName];
+
+ Suite.prototype[methodName] = function() {
+ var value = this,
+ result = func.apply(value, arguments);
+
+ if (value.length === 0) {
+ delete value[0];
+ }
+ return result;
+ };
+ });
+
+ // Avoid buggy `Array#unshift` in IE < 8 which doesn't return the new
+ // length of the array.
+ Suite.prototype.unshift = function() {
+ var value = this;
+ unshift.apply(value, arguments);
+ return value.length;
+ };
+
+ return Benchmark;
+ }
+
+ /*--------------------------------------------------------------------------*/
+
+ // Export Benchmark.
+ // Some AMD build optimizers, like r.js, check for condition patterns like the following:
+ if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
+ // Define as an anonymous module so, through path mapping, it can be aliased.
+ define(['lodash', 'platform'], function(_, platform) {
+ return runInContext({
+ '_': _,
+ 'platform': platform
+ });
+ });
+ }
+ else {
+ var Benchmark = runInContext();
+
+ // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
+ if (freeExports && freeModule) {
+ // Export for Node.js.
+ if (moduleExports) {
+ (freeModule.exports = Benchmark).Benchmark = Benchmark;
+ }
+ // Export for CommonJS support.
+ freeExports.Benchmark = Benchmark;
+ }
+ else {
+ // Export to the global object.
+ root.Benchmark = Benchmark;
+ }
+ }
+}.call(this));