570335 - Bad performance playing HTML5 videos on N900

Status: RESOLVED WONTFIX

(Firefox for Android Graveyard :: General, defect)

Description

[Toni Hermoso Pulido]

In a Nokia N900 with last Fennec nightly versions (also with last beta) I notice a very bad performance when playing ogg videos (an example: http://tinyvid.tv/show/2yd3hfxwf0g9o) No such a problem when playing in desktop builds (just tried Mac OS X one). No problem when playing Flash videos.

Comment 1

[Matt Brubeck (:mbrubeck)]

Matthew Gregan is working on hardware-accelerated decoding for Ogg Theora, which should help: http://blog.mjg.im/2010/04/16/theora-on-n900.html

Comment 2

[Toni Hermoso Pulido]

Thanks for the link! I guess we will not be able to benefit from it in 1.1 yet, will we?

Comment 3

[Matt Brubeck (:mbrubeck)]

This probably depends on bug 511348 (Tremor decoding for Vorbis audio), which is blocking-fennec:2.0+.

Comment 4

[Oleg Romashin (:romaxa)]

On thing could help here is:
http://hg.mozilla.org/mobile-browser/rev/1d6ea74da2c0

Comment 6

[Oleg Romashin (:romaxa)]

Attachment: Latest opreport with WebM + SW rendering

6% - neon_yuv->rgb16
5% - layer_scaling.

Comment 7

[Oleg Romashin (:romaxa)]

Attachment: backtrace for bad pixman

Comment 8

[Siarhei Siamashka]

(In reply to comment #7)
> Created attachment 508551 [details]
> backtrace for bad pixman

I think that all such missing fast paths have been introduced in upstream pixman. So if this bug is about adding optimizations to the existing parts of the pipeline, then just taking the newest pixman should resolve them.

Nevertheless a lot of graphics operations seem to be highly redundant in Fennec, and I have submitted a new bug 641196 for profiling various ways of html5 video playback.

Comment 10

[BMO Automation]

Closing all opened bug in a graveyard component