1133272 - Scrolling performance on is horrible on http://graphics.wsj.com/infectious-diseases-and-vaccines/

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect)

Description

[Doug Turner (:dougt)]

http://graphics.wsj.com/infectious-diseases-and-vaccines/


Scrolling this page results in a ton of jank.

Application Basics
------------------

Name: Firefox
Version: 36.0
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:36.0) Gecko/20100101 Firefox/36.0
Multiprocess Windows: 0/1



Graphics
--------

Device ID: 0x a2e
GPU Accelerated Windows: 1/1 OpenGL (OMTC)
Vendor ID: 0x8086
WebGL Renderer: Intel Inc. -- Intel Iris OpenGL Engine
windowLayerManagerRemote: true
AzureCanvasBackend: quartz
AzureContentBackend: quartz
AzureFallbackCanvasBackend: none
AzureSkiaAccelerated: 0

Comment 1

[Milan Sreckovic [:milan] (needinfo for best results)]

This is one example where switching to Skia makes things worse.  Marcus, I see you on the bug already, did this get better with the work you recently did on OS X?  In other words, was it even worse?

Comment 2

[Markus Stange [:mstange]]

The work I did on OS X hasn't landed yet (bug 1123019), but it does make scrolling on this page a lot better!

Comment 3

[Markus Stange [:mstange]]

And it's probably the first patch in bug 1123019 that makes the difference, and since that touches shared code in DrawTargetTiled.cpp, it will probably also help Skia.

Comment 4

[Milan Sreckovic [:milan] (needinfo for best results)]

Confirming that turning off tiling does improve the performance, so it makes sense that bug 1123019 would make a difference.

Comment 5

[Milan Sreckovic [:milan] (needinfo for best results)]

This works for me now, Doug, are you still seeing the problem?