[#DWR-241] Iframe mode causes memory leaks and page resizing - DWR

DWR

Iframe mode causes memory leaks and page resizing

Created: 27/Mar/08 02:50 PM Updated: 22/May/09 04:16 AM

Component/s:

engine

Affects Version/s:

2.0, 2.0.1, 2.0.2, 2.0.3, 3.0.M1

Fix Version/s:

3.0

Description

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Doing calls in IFRAME mode (enabled by "rpcType: dwr.engine.IFrame" in call options) causes a few problems:

1) Memory leak in IE
The following leaked memory amount, and leaked HTML elements, are reported by the respective IE browser:
IE6sp1 and IE6sp2: 40-60KB/call, leaking div/iframe/form
IE7: 32-34KB/call, leaking div/iframe/form and inputs
Thus, it seems the dynamically generated elements are not cleaned up properly even though they are removed from DOM. Could be a closure problem or similar.

2) Page resizing
The generated elements seem to affect page layout. This can be seen as a flickering scrollbar for a page that is taller than the browser window.

3) Opera
There seems to be an error in Opera, reporting "Incomplete reply from server". It would be good if someone else tried IFRAME mode in Opera to verify.

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Joe Walker added a comment - 31/Mar/08 01:56 PM

I think I've just fixed both of these, it would be good if you could have a quick check on your return.

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Mike Wilson added a comment - 15/Apr/08 03:13 PM

I still see all three problems. The only change I see is that the leaked IFRAMEs now have other ids.