Changeset 31226 in webkit for trunk/JavaScriptCore/kjs/JSGlobalObject.cpp

Timestamp:

Mar 21, 2008, 9:59:20 PM (17 years ago)

Author:

[email protected]

Message:

Optimise lookup of Math, undefined, NaN and Infinity

Reviewed by Maciej

Added a method to JSVariableObject to allow us to inject DontDelete properties
into the symbol table and localStorage. This results in a 0.4% progression in
SunSpider, with a 8% gain in math-partial-sums.

File:

• trunk/JavaScriptCore/kjs/JSGlobalObject.cpp (modified) (1 diff)

trunk/JavaScriptCore/kjs/JSGlobalObject.cpp

@@ -310 +310 @@
 
     // Set global values.
-
-    putDirect("Math", new MathObjectImp(exec, d()->objectPrototype), DontEnum);
-
-    putDirect("NaN", jsNaN(), DontEnum | DontDelete);
-    putDirect("Infinity", jsNumber(Inf), DontEnum | DontDelete);
-    putDirect("undefined", jsUndefined(), DontEnum | DontDelete);
+    Identifier mathIdent = "Math";
+    JSValue* mathObject = new MathObjectImp(exec, d()->objectPrototype);
+    symbolTableInsert(mathIdent, mathObject, DontEnum | DontDelete);
+    
+    Identifier nanIdent = "NaN";
+    JSValue* nanValue = jsNaN();
+    symbolTableInsert(nanIdent, nanValue, DontEnum | DontDelete);
+    
+    Identifier infinityIdent = "Infinity";
+    JSValue* infinityValue = jsNumber(Inf);
+    symbolTableInsert(infinityIdent, infinityValue, DontEnum | DontDelete);
+    
+    Identifier undefinedIdent = "undefined";
+    JSValue* undefinedValue = jsUndefined();
+    symbolTableInsert(undefinedIdent, undefinedValue, DontEnum | DontDelete);
 
     // Set global functions.