775222 - WebGL on Nightly on JellyBean is very slow

Status: RESOLVED WORKSFORME

(Core :: Graphics: CanvasWebGL, defect)

Description

[(no longer active)]

The SpaceRocks samples runs at 2-3 fps for me.

Comment 1

[Benoit Girard (:BenWa)]

That's an interesting find. Are we sure it's a regression form JellyBean?

Comment 2

[(no longer active)]

(In reply to comment #1)
> That's an interesting find. Are we sure it's a regression form JellyBean?

No!

Comment 3

[Oleg Romashin (:romaxa)]

I took recently nexus-7 tablet and found nightly also very slow on JellyBean... after I added fence_sync + 565 patches I got 20FPS on webgl aquarium...
Could it be that current version of WebGL sharing is just supoer slow (slower than SW rendering path)?

Comment 4

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

So on my Galaxy Nexus with newly installed JB, I'm getting around 25-28fps with Aquarium (from my slightly changed version via http://conduit.bitops.com/~vladimir/misc/webgl-demos.html).  With 565 and alpha:false flipped on and fence_sync patch from a tinderbox build, I get maybe 15% more or so, 27-30fps.  That's better than ICS was here, so I'm not sure what's going on.

spacerocks I get around 10fps (with the stock one from webglsamples).

Comment 5

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

... until I zoom in and out, then I get 2-3, sometimes 4fps.  Very jerky.

Comment 6

[Kelsey Gilbert [:jgilbert]]

(In reply to Oleg Romashin (:romaxa) from comment #3)
> I took recently nexus-7 tablet and found nightly also very slow on
> JellyBean... after I added fence_sync + 565 patches I got 20FPS on webgl
> aquarium...
> Could it be that current version of WebGL sharing is just supoer slow
> (slower than SW rendering path)?

Being slower than readback is extremely unlikely. But I suppose almost anything is possible with mobile drivers.

Is it possible Spacerocks is simply Slow?

Comment 7

[Oleg Romashin (:romaxa)]

Just tested nightly on Nexus-7 and it is horribly slow...
but if in about:config set preference
webgl.prefer-16bpp -> true, then aquarium and spacerocks works with ~20FPS, looks pretty ok for me.
Compare to opera which show aquarium and spacerocks only ~6FPS

Comment 8

[Oleg Romashin (:romaxa)]

Can we set that pref true by default?

Comment 9

[Kelsey Gilbert [:jgilbert]]

(In reply to Oleg Romashin (:romaxa) from comment #8)
> Can we set that pref true by default?

My understanding is that we need to figure out to handle this with the working group. Currently, WebGL requires 8-bit-per-channel color.

Comment 10

[Benoit Jacob [:bjacob] (mostly away)]

However, the data here is exactly what would help convince the working group. Jeff/Vlad are you going to push again now that we have this data, on a recent good phone on Jelly Bean?

Comment 11

[Kelsey Gilbert [:jgilbert]]

Spacerocks in default nightly gets 19 steady-state fps.
Flipping prefer-no-alpha and prefer-16bpp I get about 20.

Closer testing might show that these are basically the same.