Changeset 3736 in webkit for trunk/JavaScriptCore/kjs/identifier.cpp

Timestamp:

Mar 3, 2003, 5:13:26 PM (22 years ago)

Author:

mjs

Message:

JavaScriptCore:

Reviewed by Trey.

• fixed 3158833 - ebay prefs page is so slow, it seems like a hang.

92% speed improvement on ebay prefs page.
1% speed improvement on js-ibench and js-performance plt suites.

There were a couple of problems with the identifier hash table that
I fixed:

• kjs/identifier.cpp: (void Identifier::remove): Adjust the shrink threshold to avoid constantly growing and shrinking.
• kjs/ustring.cpp: (UString::Rep::computeHash): Use a better hash function that avoids collisions for obvious data sets.

WebFoundation:

Reviewed by Trey.

Updated string hash function to match the new, improved one in
JavaScriptCore.

• Database.subproj/WebLRUFileList.m: (cStringHash):

WebCore:

Reviewed by Trey.

Updated string hash function to match the new, improved one in
JavaScriptCore.

• kwq/KWQCharsets.mm: (encodingNameHash):

File:

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

trunk/JavaScriptCore/kjs/identifier.cpp

@@ -255 +255 @@
     --_keyCount;
     
-    if (_keyCount * 3 < _tableSize && _tableSize > _minTableSize) {
+    if (_keyCount * 6 < _tableSize && _tableSize > _minTableSize) {
         shrink();
         return;