Changeset 42065 in webkit for trunk/JavaScriptCore/bytecompiler/BytecodeGenerator.h

Timestamp:

Mar 27, 2009, 8:50:39 PM (16 years ago)

Author:

[email protected]

Message:

Improve performance of Function.prototype.call
<​https://bugs.webkit.org/show_bug.cgi?id=24907>

Reviewed by Gavin Barraclough

Optimistically assume that expression.call(..) is going to be a call to
Function.prototype.call, and handle it specially to attempt to reduce the
degree of VM reentrancy.

When everything goes right this removes the vm reentry improving .call()
by around a factor of 10.

File:

• trunk/JavaScriptCore/bytecompiler/BytecodeGenerator.h (modified) (1 diff)

trunk/JavaScriptCore/bytecompiler/BytecodeGenerator.h

@@ -299 +299 @@
         PassRefPtr<Label> emitJumpIfTrue(RegisterID* cond, Label* target);
         PassRefPtr<Label> emitJumpIfFalse(RegisterID* cond, Label* target);
+        PassRefPtr<Label> emitJumpIfNotFunctionCall(RegisterID* cond, Label* target);
         PassRefPtr<Label> emitJumpScopes(Label* target, int targetScopeDepth);