622438 - chrome and content performance drops during heavy / long sessions

Status: RESOLVED DUPLICATE of bug 490122

(Firefox :: General, defect)

Description

[Danial Horton]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 GTB7.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13 GTB7.1

I've been noticing this since 3.6.11

during heavy sessions, the performance of tab loading or animations / animated applets will reduce severely. for example, the chomping dinosaur during bugzilla searches will lag unless you move your mouse across the content area, it seems to also affect flash and other animated plugin content as well, trying to seek in a youtube video will hang the display updates until either the video stops playing or you force a chrome change (for example, forcing the exit prompt to open by right clicking the taskbar icon and clicking close), or kill the plugin container.

perfect reproduction for this is basically impossible to describe because of it occuring mainly during a heavy session. When the issue occurs, cpu usage will be in the 0-2% range so its not as if the process is using excessive amounts of cpu either.

I considered it might be an extension issue so i created a fresh profile with only session manager installed and opened the session there with the same results

The odd thing is, sometimes the issue takes more than a week to manifest, and others it happens in a single browsing session, and that mentioned week usually is heavy in flash applet usage and browsing, while the single day might just be browsing some image heavy pages.

Reproducible: Sometimes

Steps to Reproduce:
difficult to STR, there is no significant events that trigger it, it just randomly starts to happen.
Actual Results:  
animations will appear lagged unless moving the mouse and chrome animations may also appear lagged.

Applets may appear hung and the browser itself may appear hung while interacting with the applet

Expected Results:  
chrome and content to behave normally regardless of the activity in the session.

It doesn't appear to be memory or applet related, granted i've noticed it occur frequently when and after using cityville, for a bit, but facebook and its pages are brutally coded as it is.... cpu is practically idle and firefox barely uses any, the issue occurs even when no plugin containers are loaded so i can't say i believe its ipc related at all.

this could be another paint timing issue?

Comment 1

[Danial Horton]

its probably bug 490122