[Webkit-unassigned] [Bug 15350] New: skip extra hash lookup and avoid converting char* to UString for 19% speedup on CK JS array test

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=15350

           Summary: skip extra hash lookup and avoid converting char* to
                    UString for 19% speedup on CK JS array test
           Product: WebKit
           Version: 522+ (nightly)
          Platform: Macintosh
               URL: http://celtickane.com/projects/jsspeed2007.php
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mjs at apple.com


The Celtic Kane JavaScript Benchmark "Array" test can be sped up 19% by using
the return value from add() to avoid an extra hash lookup for contains(), and
by storing some strings in function-scope static UString variables instead of
as constant strings used to make new UStrings every time. These issues mainly
affect the Array "join" and "toString" operations, which unfortunately seem to
make up the vast majority of time on this benchmark.


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