[Webkit-unassigned] [Bug 102979] 10% regression in dromaeo_domcoreattr/dom_attr_getAttribute

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=102979





--- Comment #6 from Kentaro Hara <haraken at chromium.org>  2012-11-21 18:15:35 PST ---
BTW, this regression gives me an insight for another optimization.

For types other than V8Parameter, we are using EXCEPTION_BLOCK(), which allocates a TryCatch object every time. By adding a fast path that avoids creating a TryCatch object, we could improve performance.

For example, EXCEPTION_BLOCK(double, value, args[0]->NumberValue()) can avoid allocating a TryCatch object when args[0]->IsNumber() is true.

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