729375 - javascript alerts eat CPU for no good reason

Status: RESOLVED WORKSFORME

(Toolkit Graveyard :: Notifications and Alerts, defect)

Description

[Dan Jacobson]

Attachment: u.html -- BROWSEME

User Agent: Mozilla/5.0 (X11; Linux i686; rv:12.0a2) Gecko/20120217 Firefox/12.0a2 Iceweasel/12.0a2
Build ID: 20120217042010

Steps to reproduce:

Ran this little file


Actual results:

Ate most of my CPU


Expected results:

Shouldn't eat any CPU more than Google Chrome... I.e., no looping please.

Nope, can't deny this is a bug.

Comment 1

[Dan Jacobson]

strace shows looping in

clock_gettime(CLOCK_MONOTONIC, {10956, 577860500}) = 0
clock_gettime(CLOCK_MONOTONIC, {10956, 577894863}) = 0
_llseek(20, 2580, [2580], SEEK_SET)     = 0
write(20, "SQLite format 3\0\4\0\1\1\0@  \0\0)\211\0\0\0033"..., 1024) = 1024
clock_gettime(CLOCK_MONOTONIC, {10956, 578036225}) = 0
clock_gettime(CLOCK_MONOTONIC, {10956, 578071426}) = 0

whereas Google Chrome dispenses with such erroneous behavior.

Comment 2

[Thomas Ahlblom]

WFM:
Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.27) Gecko/20120216 Firefox/3.6.27
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2
Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20100101 Firefox/11.0
Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120223 Firefox/13.0a1

Reproduced:
Mozilla/5.0 (X11; Linux x86_64; rv:12.0a2) Gecko/20120223 Firefox/12.0a2

Thus, it looks like this bug is unique to Firefox Aurora by some reason.

Comment 3

[Thomas Ahlblom]

WFM:
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0a2) Gecko/20120223 Firefox/12.0a2
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:13.0) Gecko/20120223 Firefox/13.0a1

Thus, I've not been able to reproduce the bug using Windows.

Comment 4

[[:Aleksej]]

WFM with 2013-08-22-03-02-04-mozilla-central-firefox-26.0a1.en-US.linux-x86_64: CPU load mostly stays at 4-5%.

Comment 5

[Matthew N. [:MattN]]

Bulk move to Toolkit::Notifications and Alerts

Filter on notifications-and-alerts-component.

Comment 6

[Wayne Mery (:wsmwk)]

Dan, do you till see this issue?


(In reply to Thomas Ahlblom from comment #2)
> WFM:
> Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.27) Gecko/20120216
> Firefox/3.6.27
> Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20100101 Firefox/10.0.2
> Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20100101 Firefox/11.0
> Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120223 Firefox/13.0a1
> 
> Reproduced:
> Mozilla/5.0 (X11; Linux x86_64; rv:12.0a2) Gecko/20120223 Firefox/12.0a2
> 
> Thus, it looks like this bug is unique to Firefox Aurora by some reason.

Comment 7

[Dan Jacobson]

Not seen anymore in FF46.