674991 - Hangs/freezes on washingtonpost.com

Status: RESOLVED WORKSFORME

(Firefox for Android Graveyard :: General, defect)

Description

[Martijn Wargers (dead)]

I'm getting long hang delays/freezing on washingtonpost.com

Steps to reproduce:
- Open http://www.washingtonpost.com/politics
- Open one of the articles in a new tab

Expected result:
- No hang/freeze, everything going smoothly.

Actual result:
- Fennec hangs, can wait for minutes before it does anything useful.

CpuNotify reports 100% cpu while this hang occurs.

This is with the LG Optimus Black.

Comment 1

[Martijn Wargers (dead)]

Finally after a long while, I get a slow script warning, which I'm unable to tap on to stop the script, because it doesn't respond.

Comment 2

[Martijn Wargers (dead)]

Attachment: logcat file

This is a logcat file while the freezing occurs. This is with two tabs open of http://www.washingtonpost.com/politics
I noticed slow script warnings of the page (of the yui js library?). After dismissing that dialog (which took a very long time), Fennec continued very slowly and as good as unresponsive.

Comment 3

[Kevin Brosnan [Ex-Mozilla]]

Nothing Gecko or Mozilla in the logcat sadly.

Comment 4

[Naoki Hirata :nhirata (please use needinfo instead of cc)]

Was there anything in the console?
My guess is that you ran into some issues with unresponsive js.

I cannot reproduce with today's build.

Comment 5

[Martijn Wargers (dead)]

No, there wasn't anything in the console.
Indeed, after a while, I get the unresponsive/slow script dialog sometimes, which I almost can't dismiss.
But at times, the whole Android OS restarts, also.

I guess, if you can't reproduce, try it with a few more tabs open with washingtonpost.com.

Comment 6

[Martijn Wargers (dead)]

I talked with Mark Finkle about this personally, he mentioned 3 options to investigate/improve the situation here:
- monitor rss (amount of free memory) on the device. A script (on the computer, using adb stuff that constantly monitors rss) can do that (mbrubeck has such a script) to see if the amount of memory usage is large/too big.
- Zombie all of the tabs all the time (an extension could be made that does this)
- Use an instrumented build that gives more info when logcatting on those.

Comment 7

[Martijn Wargers (dead)]

I just noticed a similar hang (but this hang only happened for 30s or so) after logging in on https://www.mint.com
I get the impression it has something to do with loading large external script libraries which are doing all kinds of dom stuff, I guess.

Comment 8

[Marcia Knous [:marcia]]

Discussed at the Beta meeting today. Marcia to take point on trying to get more information and a regression range.

Comment 9

[Martijn Wargers (dead)]

I don't think this is a regression (I might be wrong, though).

Comment 10

[Frank Adams]

Suggest changing architecture to ARM and platform to Android or Windows Phone 7/Windows Mobile (depending on how its being reproduced) as well as what the individual who filed it used when they found it.

Comment 11

[Tony Chung [:tchung]]

Unable to reproduce on Fennec 11 beta 3 XUL build.   I'm using a Galaxy Nexus though.   Please try this again and reopen if its happening.