Changeset 50789 in webkit for trunk/JavaScriptCore/runtime/MathObject.cpp

Timestamp:

Nov 10, 2009, 11:22:30 PM (16 years ago)

Author:

[email protected]

Message:

Faster Math.random, based on GameRand.

Reviewed by Gavin "avGni arBalroguch" Barraclough.

SunSpider says 1.4% faster.

• GNUmakefile.am:
• JavaScriptCore.gypi:
• JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
• JavaScriptCore.xcodeproj/project.pbxproj: Added the header to the project.

• runtime/JSGlobalData.cpp:

(JSC::JSGlobalData::JSGlobalData):

• runtime/JSGlobalData.h: Use an object to track random number generation

state, initialized to the current time.

• runtime/MathObject.cpp:

(JSC::MathObject::MathObject):
(JSC::mathProtoFuncRandom): Use the new hotness.

• runtime/WeakRandom.h: Added.

(JSC::WeakRandom::WeakRandom):
(JSC::WeakRandom::get):
(JSC::WeakRandom::advance): The new hotness.

File:

• trunk/JavaScriptCore/runtime/MathObject.cpp (modified) (2 diffs)

trunk/JavaScriptCore/runtime/MathObject.cpp

@@ -97 +97 @@
     putDirectWithoutTransition(Identifier(exec, "SQRT1_2"), jsNumber(exec, sqrt(0.5)), DontDelete | DontEnum | ReadOnly);
     putDirectWithoutTransition(Identifier(exec, "SQRT2"), jsNumber(exec, sqrt(2.0)), DontDelete | DontEnum | ReadOnly);
-    WTF::initializeWeakRandomNumberGenerator();
 }
 
@@ -212 +211 @@
 JSValue JSC_HOST_CALL mathProtoFuncRandom(ExecState* exec, JSObject*, JSValue, const ArgList&)
 {
-    return jsNumber(exec, WTF::weakRandomNumber());
+    return jsNumber(exec, exec->globalData().weakRandom.get());
 }