Changeset 36401 in webkit for trunk/JavaScriptCore/VM/CodeGenerator.cpp

Timestamp:

Sep 14, 2008, 1:18:49 AM (17 years ago)

Author:

[email protected]

Message:

Bug 20821: Cache property transitions to speed up object initialization
​https://bugs.webkit.org/show_bug.cgi?id=20821

Reviewed by Cameron Zwarich.

Implement a transition cache to improve the performance of new properties
being added to objects. This is extremely beneficial in constructors and
shows up as a 34% improvement on access-binary-trees in SunSpider (0.8%
overall)

File:

• trunk/JavaScriptCore/VM/CodeGenerator.cpp (modified) (1 diff)

trunk/JavaScriptCore/VM/CodeGenerator.cpp

@@ -837 +837 @@
     instructions().append(0);
     instructions().append(0);
+    instructions().append(0);
+    instructions().append(0);
     return value;
 }