[Webkit-unassigned] [Bug 19312] New: SVG hit testing is *way* too slow

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu May 29 10:57:43 PDT 2008


http://bugs.webkit.org/show_bug.cgi?id=19312

           Summary: SVG hit testing is *way* too slow
           Product: WebKit
           Version: 526+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: SVG
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eric at webkit.org


SVG hit testing is *way* too slow

See the attached test case.

I think the major problem is that RenderPath::nodeAtPoint() does not to any
sort of optimization (like checking against the bbox) before testing against
fill contains.  Thus for an example like the one in the test case, we end up
doing hundreds if not thousands of unnecessary path containment tests (which
may involve mallocs, etc).


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