Changeset 77297 in webkit for trunk/Source/JavaScriptCore/ChangeLog

Timestamp:

Feb 1, 2011, 2:03:04 PM (15 years ago)

Author:

Patrick Gansterer

Message:

2011-02-01 Patrick Gansterer <Patrick Gansterer>

Reviewed by Darin Adler.

Avoid strlen() in AtomicString::fromUTF8
​https://bugs.webkit.org/show_bug.cgi?id=50516

Add an overload to calculateStringHashFromUTF8 to get
strlen() of the input data with only one call.

This change shows about 3% performance win on the xml-parser benchmark.

• JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
• wtf/text/AtomicString.cpp: (WTF::AtomicString::fromUTF8):
• wtf/unicode/UTF8.cpp: (WTF::Unicode::calculateStringHashAndLengthFromUTF8Internal): (WTF::Unicode::calculateStringHashFromUTF8): (WTF::Unicode::calculateStringHashAndLengthFromUTF8):
• wtf/unicode/UTF8.h:

File:

• trunk/Source/JavaScriptCore/ChangeLog (modified) (1 diff)

trunk/Source/JavaScriptCore/ChangeLog

@@ +1 @@
+2011-02-01  Patrick Gansterer  <[email protected]>
+
+        Reviewed by Darin Adler.
+
+        Avoid strlen() in AtomicString::fromUTF8
+        https://bugs.webkit.org/show_bug.cgi?id=50516
+
+        Add an overload to calculateStringHashFromUTF8 to get
+        strlen() of the input data with only one call.
+
+        This change shows about 3% performance win on the xml-parser benchmark.
+
+        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
+        * wtf/text/AtomicString.cpp:
+        (WTF::AtomicString::fromUTF8):
+        * wtf/unicode/UTF8.cpp:
+        (WTF::Unicode::calculateStringHashAndLengthFromUTF8Internal):
+        (WTF::Unicode::calculateStringHashFromUTF8):
+        (WTF::Unicode::calculateStringHashAndLengthFromUTF8):
+        * wtf/unicode/UTF8.h:
+
 2011-02-01  Sam Weinig  <[email protected]>