[Webkit-unassigned] [Bug 13920] New: Performance issues rendering 17MB HTML file vs. Firefox 2.0.0.3

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=13920

           Summary: Performance issues rendering 17MB HTML file vs. Firefox
                    2.0.0.3
           Product: WebKit
           Version: 522+ (nightly)
          Platform: Macintosh
               URL: http://people.redhat.com/rstrode/%23cairo.html
        OS/Version: Mac OS X 10.4
            Status: NEW
          Keywords: NeedsRadar
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ddkilzer at webkit.org
                CC: hyatt at apple.com, david.storey at opera.com


When loading the URL referenced in this bug, a local debug build of WebKit
nightly r21856 with Safari 2.0.4 (419.3) on Mac OS X 10.4.9 (8P135) takes a
long time to load and consumes 100% CPU the whole time.

Unofficial timing results (provided by a hand-operated stopwatch) by loading
the file over the network on my Quad G5:

Safari 2.0.4 (419.3): 1 minute 23.6 seconds (100%)
LOCAL-DEBUG-BUILD-WebKit-r21856: 5 minutes 48.9 seconds (100%)
WebKit-Nightly-r21869: 1 minute 5.4 seconds (100%)
Firefox 2.0.0.3: 38.9 seconds (100%)
Opera 9.21: 7 minutes 6.5 seconds (40%)  [was 20% done at ~2 minutes]

The WebKit nightly hasn't regressed from shipping Safari, but the nightly is
68% slower than Firefox 2.

Opera seems to be hitting some kind of exponential algorithm.  :(

Also, Firefox renders everything on the page underlined--not sure what's going
on there.


-- 
Configure bugmail: http://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.