[Webkit-unassigned] [Bug 31237] New: Performance regression with DocumentFragment.appendChild

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=31237

           Summary: Performance regression with
                    DocumentFragment.appendChild
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: casey.hattori at gmail.com
                CC: timothy at hatcher.name, joepeck at webkit.org,
                    pfeldman at chromium.org


I noticed the Web Inspector syntax highlighter was way too slow. It seems that
DocumentFragment.appendChild is very very slow just in the latest WebKit
nightly.

Test: Open http://keishi.net/SourceSyntaxHighlighter3/ and look at console

WebKit nightly(r50616) - 4241ms
Chromium nightly(4.0.240.0 (31395)) - 1494ms
Safari 4(4.0.3 (6531.9)) - 1487ms

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