[Webkit-unassigned] [Bug 235196] New: Specify willReadFrequently: true in benchmarks tests that do 2D canvas readbacks

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=235196

            Bug ID: 235196
           Summary: Specify willReadFrequently: true in benchmarks tests
                    that do 2D canvas readbacks
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: junov at google.com

The Images test of MotionMark does a lot of calls to getImageData, and therefore should use the willReadFrequently context creation attribute (see: https://github.com/whatwg/html/commit/d3e5732abdec1a73f716d1fd90f69313c4ddd54c ).

Various browsers (Firefox, Edge, Chrome) in the near future will be removing heuristics that chose between CPU and GPU based rendering in order to make the browser's behavior more predictable. For web apps to retain good readback performance after these heuristics are removed, they will need to specify willReadFrequently at context creation time.

For MotionMark to continue to provide fair comparisons of browser performance, it should use the willReadFrequently attribute when appropriate.

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