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 # Changelog
 
+- fixed memory leaks in the request path: per request the server leaked the
+  target sum array, the thread handles, the target word list and the
+  collocator results of all window threads, plus every string and array
+  returned from C to perl (Inline::C copies those but never frees them)
+- the result caches are size limited now and configurable via the new `cache`
+  configuration section; the neighbourhood cache never hit before because
+  lookup and store used different keys
 - added `w2v.compare_to` configuration option to configure a derekovecs
   instance to compare results to (currently only count-based LogDice-delta supported)