795530 - Poor performance with app switching and exiting

Status: RESOLVED DUPLICATE of bug 796172

(Firefox OS Graveyard :: General, defect, P1)

Description

[Tony Chung [:tchung]]

Attachment: logcat

In general, the performance of application management, switching, exiting has degraded significantly in quality and speed.  Sometimes the App won't even load.  I put together quick screencasts to show normal usage is crawling in speed.  It will even crash and reboot.  Play with it yourself, and its easy to get there.

How do we want to track these Perf issues?  They are critical to 

Screencast 1: http://youtu.be/BVjnlJ25UIo
Screencast 2: http://youtu.be/TPx2n4sfTUU

Attaching Logcat capturing screencast 1.   I noticed a lot of idleService calls, is there regressions in the Idle Api?

Environment:
- Otoro device, daily build 9-28-2012
"platform_build" revision= 7952619
"gaia" revision= dbe752c
"releases-mozilla-central" revision= 5e9ba78
"gonk-misc" revision= dbb0374

Repro:
1) Launch various apps, and switch between them
2) Perform simple actions within apps 
3) verify the performance will degrade over constant usage between apps and exiting to homescreen.

Expected: 
- the app experience should be fluid when transitioning from one to another

Actual:
- the App experience is underperformant, crashy, and refuses to load.

Comment 1

[Tim Guan-tin Chien [:timdream] (please needinfo)]

I will begin tackle this issue from bug 801306

Comment 2

[Tim Guan-tin Chien [:timdream] (please needinfo)]

(In reply to Tony Chung [:tchung] from comment #0)
> Screencast 1: http://youtu.be/BVjnlJ25UIo
> Screencast 2: http://youtu.be/TPx2n4sfTUU

Tony, at the beginning I thought this has something to do with bug 801306, but after watching the screencasts, I found that majority of the "lags" are

-- home screen doesn't reappear when you return to home; that's bug 796172.
-- some applications takes too long to load; that's bug 796254
-- from your video, some of the apps doesn't even load at all. I am not sure what's the problem with that.

I see nothing I can fix from that video; what's the new bug that you are trying to report?

Comment 3

[Tony Chung [:tchung]]

(In reply to Tim Guan-tin Chien [:timdream] (MoCo-TPE) from comment #2)
> (In reply to Tony Chung [:tchung] from comment #0)
> > Screencast 1: http://youtu.be/BVjnlJ25UIo
> > Screencast 2: http://youtu.be/TPx2n4sfTUU
> 
> Tony, at the beginning I thought this has something to do with bug 801306,
> but after watching the screencasts, I found that majority of the "lags" are
> 
> -- home screen doesn't reappear when you return to home; that's bug 796172.
> -- some applications takes too long to load; that's bug 796254
> -- from your video, some of the apps doesn't even load at all. I am not sure
> what's the problem with that.
> 
> I see nothing I can fix from that video; what's the new bug that you are
> trying to report?

Hi Tim, thanks for commenting.  we certainly can track this bug in the form of 796172 and 796254 for now.   I havent been able to reproduce screencast 2 on recent nightly builds (10-22-2012).

We can resolve this bug duped to the first bug for now, but i'll undupe if i have specifics to track.