Open Bug 792527 Opened 7 years ago Updated 7 years ago

AlphaBoxBlur paints very slow

Categories

(Core :: Graphics, defect)

18 Branch
x86_64
Windows 7
defect
Not set

Tracking

()

UNCONFIRMED

People

(Reporter: st4ck0v3rfl0w, Unassigned)

References

(Depends on 1 open bug)

Details

(Whiteboard: [Snappy])

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0
Build ID: 20120918030553

Steps to reproduce:

Some pages have a very bad framerate when scrolling. I occasionally started the gecko profiler and most of the time the painting of AlphaBoxBlur was the culprit.

Examples:
Bug 718453
Bug 732938


Actual results:

Box Shadows seriously harm the browsing experience.


Expected results:

Optimizations would have a big impact.
Depends on: 758825
Whiteboard: [Snappy]
Bas - I have a note from our Oct 4 Snappy meeting that you were to add a Telemetry probe to help measure for this issue. Did you get to do that?
(In reply to Lawrence Mandel [:lmandel] from comment #1)
> Bas - I have a note from our Oct 4 Snappy meeting that you were to add a
> Telemetry probe to help measure for this issue. Did you get to do that?

I decided to just make it faster. We can still add telemetry of course :).
Bas - Did you already make this faster in bug 509052? Can this be resolved? Should it be duped?
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