Open
Bug 1409823
Opened 8 years ago
Updated 1 year ago
Scrolling results in 100% CPU usage (perf.html attached)
Categories
(Core :: Graphics: Layers, defect, P3)
Tracking
()
NEW
People
(Reporter: nachtigall, Unassigned)
Details
(Whiteboard: [gfx-noted])
STR:
1. Go to https://www.mobile.de/auto/ and scroll with mouse wheel or keys
The CPU usage goes up to 80% on my not so young Lenovo T400 (Intel Core 2 Duo CPU P8600 @ 2.40GHz). The scrolling feels really cropped and not smooth at all. It's also high on Chrome, but only about 50%, and it "feels" smoother (perceived performance).
Recorded perf.html: https://perfht.ml/2yT8R0r
I am on Ubuntu 16.04 using Firefox Nightly
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Comment 1•8 years ago
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Compositor is using basic compositing, which is slow. And then the content thread appears to spend a lot of time blocked on a CrossProcessSemaphore waiting for the compositor to release buffers and such.
Component: Panning and Zooming → Graphics: Layers
OS: Unspecified → Linux
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Updated•8 years ago
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Whiteboard: [gfx-noted]
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Updated•8 years ago
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Priority: -- → P3
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Updated•3 years ago
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Severity: normal → S3
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Description
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