[Webkit-unassigned] [Bug 171597] REGRESSION: WebGL low performance of layer compositing in cross-origin iframe

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu May 4 13:57:03 PDT 2017


https://bugs.webkit.org/show_bug.cgi?id=171597

Simon Fraser (smfr) <simon.fraser at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|WONTFIX                     |---
            Summary|REGRESSION: WebGL low       |REGRESSION: WebGL low
                   |performance of layer        |performance of layer
                   |compositing                 |compositing in cross-origin
                   |                            |iframe

--- Comment #10 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
I think this is a combination of two issues.

The first is that we now throttle rAF in cross-origin iframe to 30fps after http://trac.webkit.org/r215070, and this test case hits that.

The second is that on some hardware, low-power GL performance is much worse than high-power GL performance.

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