Simon Cope schrieb:
Hello Sebastian,
Hi Simon,
This may not be relevent to the IE memory problems in qooxdoo. I did some research yesterday and found the following undocument global method in IE: CollectGarbage(); Apparently this forces the IE GC to run.
Looks interesting. I will try to call this method after each "dispose" call. Can you send the urls of the pages where you have found this?
Unfortunately this will NOT solve all the memory problems in IE. What I read (which I'd never heard before) indicates that attaching JS function closures in IE onto DOM nodes (eg, event handlers such as onload etc) will leak both objects if you have a circular reference because DOM nodes have a different GC than JS objects and they don't deal with circular references caused by closures. You need to remove the function closure before unreferencing the DOM node. In most cases Qooxdoo seems to do this although some of the examples leak under IE (eg, Image1 works fine, GalleryList1 leaks ~1.5MB per refresh) so there may be some cases where this happens.
QxGalleryList and QxGallery would propably need a check to fix some more issues. They were just ported to renderer without major rework some parts. I will take a look at them.
The qooxdoo app I'm working on runs fine under FF, but under IE one particular page leaks 30MB per reload and dozens of MB using the page and quickly slows to a crawl, so I'd better spend some time to modify my code and see if I can find any leaks I can attibute to specific qooxdoo objects.
Is this also true for renderer? I can detect a +2MB leak per reload in renderer if I use the combined qooxdoo.js files. In the source version there is no detectable leak in common examples here.
Please don't use your qooxdoo own apps to detect memory leaks in qooxdoo. qooxdoo's disposer does not help to dispose your application code. If you create circular references or DOM connections there, you must dispose them yourself.
Sebastian
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