Karl Rudd ha scritto:
Just been going through some of my current work and seeing what
improvements come with jQuery 1.1.3. Unfortunately it looks like
there's a bit of a regression in terms of speed for Firefox (2.0.0.4).
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.
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. Anyone have any ideas?
Under IE there is a similar, though markedly smaller, slow down
between 1.1.2 and 1.1.3.
Karl Rudd
Most of the time in jQuery 1.1.3 is spent inside the filter function.
I've done some tests and it seems that storing the most complex regexs
in a var instead of compiling them over and over, makes your code faster
in jQuery 1.1.3.
Renato
