Skip to main content

Bug Tracker

Side navigation

#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: simon.brent@gmail.com Owned by:
Priority: undecided Milestone: None
Component: unfiled Version: 1.8.1
Keywords: Cc:
Blocked by: Blocking:
Description

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:

http://jsbin.com/iyacim/1/edit (1.7.2)

http://jsbin.com/uxovuh/1/edit (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.

Attachments (0)
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!