916523 - WebGL runs very, very slowly and renders pixelated (Chrome runs well)

Status: NEW

(Core :: Graphics: CanvasWebGL, defect, P3)

Description

[donrhummy]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0 (Beta/Release)
Build ID: 20130814063812

Steps to reproduce:

Visited this page:

http://sketchfab.com/n4ji3g10ba


Actual results:

After a long load time, the image shows up but very pixelated and interactions with it are very slow.


Expected results:

Should have run as well as Chrome does on the same device (Nexus 7) or at least rendered the 3D object non-pixelated.

Comment 1

[madbiologist]

Is this still occurring on Firefox 39?  What about on Firefox 40 beta?

Comment 2

[donrhummy]

(In reply to madbiologist from comment #1)
> Is this still occurring on Firefox 39?  What about on Firefox 40 beta?

On a Nexus 9 with Firefox Beta:

1. It loads 2x as slowly as Chrome (also on Nexus 9)

2. Interaction is very laggy and non-smooth, while Chrome is very smooth and reacts quickly

3. Moving your finger on the animation up and down moves the page about half the time on Firefox but Chrome correctly traps the swiping in the animation and does not move the page

It's still very poor but runs a tiny bit better on Nexus 9 than the original Nexus 7

Comment 3

[u279076]

Here are the results of my testing across a bunch of Nexus devices. In a nutshell, the issues with loading time and pixelation were not evident, although the issue of responsiveness was evident on some devices (most notably the Nexus 9).

Nexus 4 with Android 5.1.1:
* Pixelation was evident on load but gone once loading was complete with both browsers.
* Loading time is nearly identical in both browsers.
* Both browsers show similar responsiveness lag.

Nexus 6 with Android 5.0.1:
* Pixelation was evident on load but gone once loading was complete with both browsers.
* Loading time was nearly identical in both browsers.
* Firefox exhibited responsiveness lag while Chrome did not.

Nexus 7 with Android 4.4.4:
* Pixelation was evident on load but gone once loading was complete with both browsers.
* Loading time was nearly identical in both browsers.
* Both browsers exhibited nearly identical responsiveness lag.

Nexus 9 with Android 5.0.2:
* Pixelation was evident on load but gone once loading was complete with both browsers.
* Loading time was nearly identical in both browsers.
* Firefox exhibited responsiveness lag while Chrome did not.

As a side note, Firefox seems to scroll the page up and down slightly when tap-dragging vertically whereas Chrome does not. This may or may not be relevant to this bug.