[Webkit-unassigned] [Bug 92486] New: [JSC] JSC should cache AtomicStrings

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=92486

           Summary: [JSC] JSC should cache AtomicStrings
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore JavaScript
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: haraken at chromium.org
                CC: sam at webkit.org, ggaren at apple.com, abarth at webkit.org,
                    rniwa at webkit.org


Assume Node::foo(AtomicString& str). Assume JavaScript calls node.foo("bar").

[V8] V8 can cache both Strings and AtomicStrings. "bar" is cached as an AtomicString. When node.foo("bar") is called, the cached AtomicString is passed to Node::foo(). Very efficient.

[JSC] JSC can cache Strings but cannot cache AtomicStrings. "bar" is cached as a String. When node.foo("bar") is called, the cached String has to be converted to AtomicString and then passed to Node::foo().

For more details, please refer to Comment #0 of bug 90276.

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