[Webkit-unassigned] [Bug 13233] New: Need to implement an optimizing XPath evaluator

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Mar 30 13:57:09 PDT 2007


http://bugs.webkit.org/show_bug.cgi?id=13233

           Summary: Need to implement an optimizing XPath evaluator
           Product: WebKit
           Version: 522+ (nightly)
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: XML
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: ap at webkit.org


There are many opportunities for XPath optimization that we are still missing.

Some work is still needed on micro-optimizing our implementation. For example,
it's wasteful to implement a node-set as Vector<RefPtr>, as nodes won't go away
during evaluation anyway (except for lazily created Attr nodes).

Many ideas for higher-level optimizations can be apparently borrowed from
Mozilla, see <https://bugzilla.mozilla.org/show_bug.cgi?id=208172> and
<http://www.fiveanddime.net/firefox-1.5-source/mozilla/extensions/transformiix/docs/optimized-xpath.html.html>.


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