[Webkit-unassigned] [Bug 118618] New: Don't force layout for offsetWidth of fixed width elements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=118618

           Summary: Don't force layout for offsetWidth of fixed width
                    elements
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: hyatt at apple.com, simon.fraser at apple.com,
                    dino at apple.com, benjamin at webkit.org


Consider merging https://chromium.googlesource.com/chromium/blink/+/5117d5329f6cdf071dfec25d9026a105070142b6

This improves page load time of The Economist by 41% (3.4s -> 2.0s) on
my z620 workstation.

I believe the change in the inspector/styles/device-metrics-fit-window.html expectations is a progression.
The div being measured has a fixed width of 1024 and there is a zoom on the page.
It looks to me like there was a rounding error previously.

Also see the bug 118032

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