Good analyzing!!! Francis, i think you can change EventBroadcaster to use for(var i in array) to make a new test demo, then, we can test again, if the new result views that EventBroadcaster runs as slow as EventDispatcher on Mac, then, it will be clear? .... hmmm...
2007/3/22, Brian Williams <[EMAIL PROTECTED]>:
Someone already mentioned what it is - the for in loop vs the straight for loop. for (var i in array) ends up pushing all the keys of the array on the stack, and then popping those off. for (var i =0; i< array.length; i++) doesn't. The test attaches 500 listeners to each dispatcher, so when you use the for (var i in array), you're pushing quite a few items on the stack, and it's possible that the mac flash player has slower stack access, or that that particular opcode is significantly slower. Note - the eventdispatcher code uses the for (var i in array) explicitly so that if a listener is removed from the array while dispatching an event that it still dispatches to all listeners. Be careful if you try to just change the loop. Also, why would you have 500 listeners to one broadcaster? The vast majority of the UI code that I've dealt with has 0-2 listeners. The difference between the two might be a lot smaller in that case. --Brian -- iiley AsWing http://www.aswing.org Personal http://www.iiley.com
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