[Webkit-unassigned] [Bug 156766] New: REGRESSION(198782): ImageSource calls calculateMaximumSubsamplingLevel every time it is called for subsamplingLevelForScale

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156766

            Bug ID: 156766
           Summary: REGRESSION(198782): ImageSource calls
                    calculateMaximumSubsamplingLevel every time it is
                    called for subsamplingLevelForScale
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com

Calling ImageSource::calculateMaximumSubsamplingLevel() every time ImageSource::subsamplingLevelForScale() is called is expensive because it requires fetching the first frame for up to three subsampling level. Prior to r198782, ImageSource::calculateMaximumSubsamplingLevel() (which was named BitmapImage::determineMinimumSubsamplingLevel()) was called only once from BitmapImage::updateSize(). The fix should be to cache the maximumSubsamplingLevel when the image size is available.+

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.webkit.org/pipermail/webkit-unassigned/attachments/20160419/227be7ee/attachment.html>