2010-09-10 Oliver Hunt <oliver@apple.com>
Reviewed by Darin Adler.
Speed up deserialisation of strings
https://bugs.webkit.org/show_bug.cgi?id=45555
Rather than building a list of Identifiers for the string pool
we now build a list of a tuple of UString and JSString*. This
doesn't hurt the property name case as ustring->identifier conversion
is essentially free if the ustring has already been converted to
an Identifier, but saves an unnecessary Identifier creation for
strings we only ever use to create JSStrings. We also reduce
GC pressure for duplicate strings by caching the JSStrings.
* bindings/js/SerializedScriptValue.cpp:
(WebCore::CloneDeserializer::CachedString::CachedString):
(WebCore::CloneDeserializer::CachedString::jsString):
(WebCore::CloneDeserializer::CachedString::ustring):
(WebCore::CloneDeserializer::readStringData):
(WebCore::CloneDeserializer::putProperty):
(WebCore::CloneDeserializer::readFile):
(WebCore::CloneDeserializer::readTerminal):
(WebCore::CloneDeserializer::deserialize):
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@67222 268f45cc-cd09-0410-ab3c-d52691b4dbfc
2 files changed
