[Webkit-unassigned] [Bug 16471] New: Completions need to be smaller (or not exist at all)

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=16471

           Summary: Completions need to be smaller (or not exist at all)
           Product: WebKit
           Version: 525+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.4
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: eric at webkit.org
                CC: ggaren at apple.com


Completions need to be smaller (or not exist at all)

Looking at the Shark samples, it seems to me we're spending a significant
amount of time copying completions around (during the return from an execute()
call).  Perhaps I'm reading the asm wrong, and it's simply virtual function
call overhead, but I think if we make Completions smaller (i.e. remove the
m_target member, and possibly even the type -- thus just turning all executes
into evaluates and storing the type and target on the ExecState), we'd see a
win.


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