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POJavascript closure : Memory Leak
 

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    <p>I have a memory leak I don't understand. I programmed a mechanism to handle event with semi-automatically unbinding which should allow me to clean up memory easily. But in one case, the clean up doesn't happen (I use chrome's "profile (memory heap)" to check for instances of "EventHandler" left). I really don't get why it happen. There's something weird with the closure...</p> <p><a href="http://serge.snakeman.be/Demo/test.html" rel="nofollow">see it in action with chrome</a></p> <pre><code>function Bind(obj, f) { return function() { return f.apply(obj, arguments); } } function EventHandler() { this.listeners = new Object(); var _listenerID = 0; this.addListener = function(e, obj, listener, specialDisplay) { if (typeof(listener) === "function") { var listenerID = ++_listenerID; console.log("Events (" + (++EventHandler.All) + ", " + listenerID + ") ++" + e); if (!this.listeners.hasOwnProperty(e)) { this.listeners[e] = new Object(); } this.listeners[e][listenerID] = listener; if (obj != null &amp;&amp; typeof(obj.removeListener) == "function") { var deleteListenerID = obj.addListener("Delete", null, Bind(this, function() { this.removeListener(e, listenerID); obj.removeListener("Delete", deleteListenerID); })); } return listenerID; } return null; } this.fire = function(e, obj) { if (this.listeners.hasOwnProperty(e)) { for(var i in this.listeners[e]) { this.listeners[e][i](obj); } } } this.removeListener = function(e, listenerID) { if (this.listeners.hasOwnProperty(e) &amp;&amp; this.listeners[e].hasOwnProperty(listenerID)) { delete this.listeners[e][listenerID]; console.log("Events (" + (--EventHandler.All) + ", " + listenerID + ") --" + e); } } } EventHandler.All = 0; function Loader() { } Loader.files = new Object(); Loader.LoadImage = function(src, f) { if (!Loader.files.hasOwnProperty(src)) { var handler = new EventHandler(); console.log("Loading.... (" + src + ")"); Loader.files[src] = function(fnct) { handler.addListener("ImageLoaded", handler, function(img) { fnct(img); }); } handler.addListener("ImageLoaded", handler, function() { Loader.files[src] = function(fnct) { fnct(img); } }); var img = new Image(); $(img).load(function() { console.log("Loaded.... (" + src + ")"); handler.fire("ImageLoaded", img); handler.fire("Delete"); $(img).unbind('load'); }); img.src = src; } Loader.files[src](f); } Loader.LoadImage("http://serge.snakeman.be/Demo/house.jpg", function() { alert("ok"); }); </code></pre>
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    1. USDavid Mulder
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      1. USRyan Cromwell
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    1. COCould you please do as the error message says and paste the code from jsfiddle to the question. Thanks.
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    2. COI really don't know what part of the code would be the more meaningful I was actually a bit disconcerted by the stackoverflow warning.
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    3. COIf somebody could upvote my question, I'll grant a 50 bounty for the answer...
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