Opened 16 years ago
Closed 16 years ago
#1351 closed bug (fixed)
Selection of tags slower in 1.1.3 than 1.1.2
Reported by: | krudd | Owned by: | john |
---|---|---|---|
Priority: | major | Milestone: | 1.1.4 |
Component: | core | Version: | 1.1.3 |
Keywords: | slow tag selection | Cc: | |
Blocked by: | Blocking: |
Description
So far I've only looked at the speed decrease when selecting 'input' elements, so it may be isolated to them or something general.
(You'll need Firebug on Firefox, Firebug lite is included though for other browsers.)
Here's a page with using 1.1.2:
http://krudd.net/jquery113speed/jquery_elementtest_112.html
Result: setup: 781ms
Here's the same page using 1.1.3:
http://krudd.net/jquery113speed/jquery_elementtest_113.html
Result: setup: 1937ms
And for kicks I looked at using "straight" DOM methods to select the 'inputs' (getElementsByTagName) and 1.1.3:
http://krudd.net/jquery113speed/jquery_elementtest_113_dom.html
Result: setup: 531ms
I haven't had time to dig through the 1.1.3 source to see where the slowdown could be occurring.
Under IE there is a similar, though markedly smaller, slow down between 1.1.2 and 1.1.3.
Change History (3)
comment:1 Changed 16 years ago by
comment:2 Changed 16 years ago by
Milestone: | → 1.1.4 |
---|---|
Owner: | set to john |
Priority: | minor → major |
Profiling in firebug, it seems most of the time is spent inside find.
For a simple tag search 4 non trivial and fixed regex are compiled on each find execution. They are:
Moving them from find to properties of the jQuery object made 1.1.3 faster then 1.1.2 in my tests on ff for windows.