Poor scrolling performance with WebRender enabled on mullvad.net
Categories
(Core :: Graphics: WebRender, defect, P3)
Tracking
()
People
(Reporter: goldenjoe, Unassigned)
References
(Depends on 1 open bug)
Details
Attachments
(1 file)
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(deleted),
image/png
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Details |
scrolling-perf.png
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0
Steps to reproduce:
Open https://mullvad.net, scroll up and down repeatedly. Try with WebRender both on and off.
OS: Windows 10 x64
CPU: Intel Core i5-3210M
GPU: Intel HD 4000/NVIDIA GeForce GT 640M
(the results are more or less the same when using either of them, though the problem is more apparent when using the Intel GPU)
Actual results:
Scrolling performance seems considerably worse when WebRender is enabled, and the average framerate is in fact lower. See the attached screenshot.
Expected results:
The webpage should be rendered at 60 fps.
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Comment 1•5 years ago
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Can you get a screenshot with gfx.webrender.debug.profiler turned on?
I believe it's already attached to the issue. Naturally, the same profiler doesn't show up when WebRender is off, so the "Gecko" screenshot might not be as informative.
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Comment 3•5 years ago
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Ah right. I missed that. GPU times look ok. I suspect this might be a blob image.
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Comment 4•5 years ago
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Looks good now.
Description
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