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#12510 closed bug (duplicate)

Opened September 11, 2012 02:54PM UTC

Closed September 11, 2012 03:09PM UTC

Last modified September 11, 2012 03:10PM UTC

Delegated events are much slower in IE 7/8 with 1.8.1 than with 1.7.2

Reported by: Owned by:
Priority: undecided Milestone: None
Component: unfiled Version: 1.8.1
Keywords: Cc:
Blocked by: Blocking:

If you have a large number of elements with delegated events attached, and the original bound element also has other delegated events, performance in IE 7/8 (I haven't tested 6, and 9 is fine) is much slower than it used to be.

See the following tests: (1.7.2) (1.8.1)

When you click on any of the spans saying "Click here", a red box will appear instantly in 1.7.2, but it takes much longer to do so in 1.8.1.

This still happens if all the click functions return false.

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Change History (2)

Changed September 11, 2012 03:09PM UTC by mikesherov comment:1

resolution: → duplicate
status: newclosed

Duplicate of #12436.

Changed September 11, 2012 03:10PM UTC by anonymous comment:2

Ah, sorry...I searched but didn't find!