Closed Bug 876075 Opened 11 years ago Closed 11 years ago

Firefox 21 slows down JSD and page load performance

Categories

(Core :: JavaScript Engine, defect)

Product:
Core
Component:
JavaScript Engine
Version:
20 Branch
Platform:
x86
Windows Vista
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 875797

People

(Reporter: Honza, Unassigned)

Details

(Whiteboard: firebug-p1)

Since Firefox 21 has been released, there is a lot of complaints about Firebug slowing down page load. According to the reports, it happens when the Console or the Script panel are enabled. This is (with high probability) related to JSD, since both Console and Scrip panel activate it. Here is the newsgroup thread: https://groups.google.com/forum/#!topic/firebug/HKu6FQ1b6i8 Reported STR: 1) Install Firebug 1.11.4 from AMO https://addons.mozilla.org/en-US/firefox/addon/firebug/ 2) Load http://demo.rockettheme.com/joomla/alerion/ 3) Select and enable the Script panel 4) Reload the page and observer the performance problems Could anyone look into this and do profiling to find out what has changed in Firefox 21? I am marking as firebug-p1 since it's critical bug for Firebug. Honza
Related issue reported in Firebug issue list http://code.google.com/p/fbug/issues/detail?id=6458 Honza
Jim, who do you think is be the best person to ask for help with this bug? Honza
Blocks: 875797
Is this still happening in nightlies? In a nightly, the str from comment show no appreciable lag for me....
Flags: needinfo?(odvarko)
Bobby, Gabor, any tips what could be wrong here? The problem is probably with JSD and happened in Firefox 21. See also bug 875797 Honza
Flags: needinfo?(odvarko)
Would really appreciate an answer to comment 4. Is this reproducible in nightlies? In Aurora? In beta?
Flags: needinfo?(odvarko)
(In reply to Boris Zbarsky (:bz) from comment #4) > Is this still happening in nightlies? In a nightly, the str from comment > show no appreciable lag for me.... Unfortunately, I can't reproduce the problem on my machine (Win Vista + Firebug 1.11.4 + Firefox 21,22,23,24) Honza
Flags: needinfo?(odvarko)
Boris, is there a way to get a dump of what is going on when Firefox shows the beach ball on a Mac? I easily get into this state, and a restart of Firefox will fix it temporarily.
Well, there are various profilers, if you're using a nightly...
(In reply to Boris Zbarsky (:bz) from comment #6) > Would really appreciate an answer to comment 4. Is this reproducible in > nightlies? In Aurora? In beta? Here is another page reported by Firebug users that should cause the problem. http://docs.sencha.com/extjs/4.2.1/#!/example/build/KitchenSink/ext-theme-neptune/ I tested on Firefox 21,22,23,24 and it really seems that Firefox 21 is taking more time to load the page. Also, it looks like the 'page load icon' (replacing the tab close button during the page load) freezes more than in other Firefox version. Boris, can you see the same? From other reports I have got, the problem doesn't seem to be OS specific. Honza
Same here, on 2 Archlinux machines running Firefox 21. New profile and updating Firebug didn't helped. I must disable "console" and "script" tabs to disable the slow page loading.
FWIW the steps of comment 11 in bug 875797 are the same here. Just replace step 2 by loading the URL of comment 10. Sebastian
No longer blocks: 875797
Status: NEW → RESOLVED
Closed: 11 years ago
Resolution: --- → DUPLICATE
Does not look like a duplicated and is not fixed yet.
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