Problem: when running long selenium scripts, browser process eats memory like a hungry boa. Cause: selenium does not release events attached to tested app objects. Solution: register attached events and release them on page unloads. Idea was found at http://novemberborn.net/javascript/event-cache Patch: You need to add eventcache.js (http://novemberborn.net/javascript/event-cache.js , also provided here) to your selenium directory and patch some selenium files: --------------------------------------- eventcache.js (add) start --------------------------------------- /* EventCache Version 1.0 Copyright 2005 Mark Wubben Provides a way for automagically removing events from nodes and thus preventing memory leakage. See <http://novemberborn.net/javascript/event-cache> for more information. This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/> */ //window.alert ("Event_Cache.js!"); /* Implement array.push for browsers which don't support it natively. Please remove this if it's already in other code */ if(Array.prototype.push == null){ Array.prototype.push = function(){ for(var i = 0; i < arguments.length; i++){ this[this.length] = arguments[i]; }; return this.length; }; }; /* Event Cache uses an anonymous function to create a hidden scope chain. This is to prevent scoping issues. */ var EventCache = function(){ var listEvents = []; return { listEvents : listEvents, add : function(node, sEventName, fHandler, bCapture){ listEvents.push(arguments); }, flush : function(){ var i, item; for(i = listEvents.length - 1; i >= 0; i = i - 1){ item = listEvents[i]; if(item[0].removeEventListener){ item[0].removeEventListener(item[1], item[2], item[3]); }; /* From this point on we need the event names to be prefixed with 'on" */ if(item[1].substring(0, 2) != "on"){ item[1] = "on" + item[1]; }; if(item[0].detachEvent){ item[0].detachEvent(item[1], item[2]); }; item[0][item[1]] = null; }; } }; }(); --------------------------------------- eventcache.js (add) end --------------------------------------- --------------------------------------- selenium-browserbot.js (edit) start --------------------------------------- // line 228 BrowserBot.prototype.callOnWindowPageTransition = function(loadFunction, windowObject) { var attachLoadListener = function() { if (windowObject && !windowObject.closed) { addLoadListener(windowObject, loadFunction); } }; var unloadFunction = function() { window.setTimeout(attachLoadListener, 0); }; addUnloadListener(windowObject, unloadFunction); // patch start addEvent(windowObject, "unload", EventCache.flush); // patch end }; //.....................................// // line 715 (inside MozillaPageBot.prototype.clickElement() ) if (geckoVersion) { element.addEventListener("click", function(evt) {preventDefault = evt.getPreventDefault();}, false); // patch start EventCache.add(node, "propertychange", onPropertyChangeEventHandler); // patch end } --------------------------------------- selenium-browserbot.js (edit) end --------------------------------------- --------------------------------------- html-xpath-patched.js (edit) start --------------------------------------- // line 593 ( near end of function loadNode(dom, domParentNode, node, helper) ) node.attachEvent("onpropertychange", onPropertyChangeEventHandler); // patch start EventCache.add(node, "propertychange", onPropertyChangeEventHandler); // patch end } } --------------------------------------- html-xpath-patched.js (edit) end --------------------------------------- --------------------------------------- htmlutils.js (edit) start --------------------------------------- // line 103 function addLoadListener(element, command) { if (window.addEventListener) element.addEventListener("load",command, true); else if (window.attachEvent) element.attachEvent("onload",command); // patch start EventCache.add(element, "load",command, true); // patch end } function addUnloadListener(element, command) { if (window.addEventListener) element.addEventListener("unload",command, true); else if (window.attachEvent) element.attachEvent("onunload",command); // patch start EventCache.add(element, "unload",command, true); // patch end } --------------------------------------- htmlutils.js (edit) end --------------------------------------- --------------------------------------- TestRunner.html (edit) start --------------------------------------- <!-- line 29 --> <!-- patch start --> <script language="JavaScript" type="text/javascript" src="event-cache.js"></script> <!-- patch end --> --------------------------------------- TestRunner.html (edit) end ---------------------------------------