Editing Compact memoization comparisons This edit will create a new revision. Your details (optional) Name Email (won’t be displayed; might be used for Gravatar) URL Test case details Title * Published (uncheck if you want to fiddle around before making the page public) Description (in case you feel further explanation is needed)(Markdown syntax is allowed) A comparison of compact memoization routines providing the bare minimum functionality necessary for caching. Are you a spammer? (just answer the question) Preparation code Preparation code HTML (this will be inserted in the <body> of a valid HTML5 document in standards mode) (useful when testing DOM operations or including libraries) <script> function fib(x) { if (x < 2) return 1; else return fib(x - 1) + fib(x - 2); } // compact memoizer function memoize1(param) { this.memoize = this.memoize || {}; return (param in this.memoize) ? this.memoize[param] : this.memoize[param] = fib(param); } // using an external cache var memCache = {}; function memoize2(param, cache) { cache = cache || {}; return (param in cache) ? cache[param] : cache[param] = fib(param); } // stoyan's memoizer function memoize3(param) { if (!memoize3.cache) { memoize3.cache = {}; } if (!memoize3.cache[param]) { var result = fib(param); //custom function memoize3.cache[param] = result; } return memoize3.cache[param]; } var m1,m2,m3 = 0; </script> Include JavaScript libraries as follows: <script src="//cdn.ext/library.js"></script> Define setup for all tests (variables, functions, arrays or other objects that will be used in the tests) (runs before each clocked test loop, outside of the timed code region) (e.g. define local test variables, reset global variables, clear canvas, etc.) (see FAQ) Define teardown for all tests (runs after each clocked test loop, outside of the timed code region) (see FAQ) Code snippets to compare Test 1 Title Async (check if this is an asynchronous test) Code m1 = memoize1(25); setTimeout(function(){ m1 = memoize1(25); }, 1000); Test 2 Title Async (check if this is an asynchronous test) Code m3 = memoize3(25); setTimeout(function(){ m3 = memoize3(25); }, 1000); Test 3 Title Async (check if this is an asynchronous test) Code m2 = memoize2(25, memCache); setTimeout(function(){ m2 = memoize2(25, memCache); }, 1000);