927507 - High CPU utilization

Status: RESOLVED FIXED

(Core :: XPCOM, defect)

Description

[Alice0775 White]

Attachment: testcase zip ( Open index.html )

This is spun off from Bug 927377

Steps To Reproduce: 
1. Open http://frozenbyte.com/ (VG studio)
   or Open testcase

Actual Results:
 Firefox process (in process manager of Win 7) shows more 30% of CPU use.

Regression window:
Bad (around CPU 20%):
http://hg.mozilla.org/integration/mozilla-inbound/rev/89ad76a08a74
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121211 Firefox/20.0 ID:20121211125858
More Bad (around CPU 30%):
http://hg.mozilla.org/integration/mozilla-inbound/rev/9602f98a6a70
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20121211 Firefox/20.0 ID:20121211143159
Pushlog:
http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=89ad76a08a74&tochange=9602f98a6a70
In local build:
Bad: 9dffd2d825c9
More bad: 513ec84b5c88
Regressed by: 513ec84b5c88	Vladimir Vukicevic — b=731974, requestAnimationFrame generates too short/long frames (incl. bug 799242); r=bz,smaug,roc,ehsan

Comment 1

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

I can reproduce it.  It looks like it went from "bad" to "more bad", which really sounds more like we're just rendering more frames now than we were before.  Not sure what the script is doing, but I'd guess it's the animation/slideshow thing at the top.

Comment 2

[Wayne Mery (:wsmwk)]

WFM (very modest CPU usage) with testcase and http://frozenbyte.com/ using nightly build from July on windows 7.

Alice, do you agree?

Comment 3

[Alice0775 White]

Fixed range:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=786737c759d7&tochange=fa25a75b4ad9

Fixed by: Bug 1060200