Changeset 35068 in webkit for trunk/JavaScriptCore/kjs/JSObject.h

Timestamp:

Jul 8, 2008, 11:28:27 PM (17 years ago)

Author:

[email protected]

Message:

JavaScriptCore:

2008-07-08 Geoffrey Garen <​[email protected]>

Reviewed by Oliver Hunt.

Added support for checking if an object has custom properties in its
property map. WebCore uses this to optimize marking DOM wrappers.

WebCore:

2008-07-08 Geoffrey Garen <​[email protected]>

Reviewed by Oliver Hunt.

Only artificially mark JS DOM wrappers if they have custom properties.

21X speedup on ​http://nerget.com/jstests/dom-mandelbrot.html.

No, that is not a typo.

• bindings/js/JSDOMBinding.cpp: (WebCore::ScriptInterpreter::markDOMNodesForDocument):

File:

• trunk/JavaScriptCore/kjs/JSObject.h (modified) (1 diff)

trunk/JavaScriptCore/kjs/JSObject.h

@@ -307 +307 @@
         void putDirect(ExecState*, const Identifier& propertyName, int value, unsigned attr = 0);
         void removeDirect(const Identifier& propertyName);
+        bool hasCustomProperties() { return !m_propertyMap.isEmpty(); }
 
         // convenience to add a function property under the function's own built-in name