Cache a continuable
var cache = require("continuable-cache") var fs = require("fs") var readFile = function (uri) { return function (cb) { fs.readFile(uri, cb) } } var continuableFile = readFile("./package.json") var cached = cache(continuableFile) // will only do one file read operation cached(function (err, file) { /* calls out to fs.readFile */ }) cached(function (err, file) { /* get's either err or file from cache in cached */ })
npm install continuable-cache