Changeset 76177 in webkit for trunk/Source/JavaScriptCore/parser/Lexer.h

Timestamp:

Jan 19, 2011, 4:13:03 PM (14 years ago)

Author:

Antti Koivisto

Message:

Cache function offsets to speed up javascript parsing
​https://bugs.webkit.org/show_bug.cgi?id=52622

Reviewed by Oliver Hunt.

Use cache to save function offsets and some other info.
This avoids quite a bit of work when reparsing the source.

Source/JavaScriptCore:

• parser/ASTBuilder.h:
• parser/JSParser.cpp:

(JSC::JSParser::CachedFunctionInfo::CachedFunctionInfo):
(JSC::JSParser::CachedFunctionInfo::approximateByteSize):
(JSC::JSParser::CachedFunctionInfo::closeBraceToken):
(JSC::JSParser::Scope::copyCapturedVariablesToVector):
(JSC::JSParser::Scope::saveFunctionInfo):
(JSC::JSParser::Scope::restoreFunctionInfo):
(JSC::JSParser::findCachedFunctionInfo):
(JSC::JSParser::JSParser):
(JSC::JSParser::parseProgram):
(JSC::JSParser::parseFunctionInfo):

• parser/Lexer.h:

(JSC::Lexer::setOffset):
(JSC::Lexer::setLineNumber):
(JSC::Lexer::sourceProvider):

• parser/SourceProvider.h:

(JSC::SourceProviderCache::SourceProviderCache):
(JSC::SourceProviderCache::~SourceProviderCache):
(JSC::SourceProviderCache::byteSize):
(JSC::SourceProviderCache::add):
(JSC::SourceProviderCache::get):
(JSC::SourceProvider::SourceProvider):
(JSC::SourceProvider::~SourceProvider):
(JSC::SourceProvider::cache):
(JSC::SourceProvider::notifyCacheSizeChanged):
(JSC::SourceProvider::cacheSizeChanged):

• parser/SyntaxChecker.h:

Source/WebCore:

• bindings/js/CachedScriptSourceProvider.h:

(WebCore::CachedScriptSourceProvider::cache):
(WebCore::CachedScriptSourceProvider::cacheSizeChanged):
(WebCore::CachedScriptSourceProvider::CachedScriptSourceProvider):

• bindings/js/ScriptSourceProvider.h:

(WebCore::ScriptSourceProvider::ScriptSourceProvider):

• loader/cache/CachedScript.cpp:

(WebCore::CachedScript::destroyDecodedData):
(WebCore::CachedScript::sourceProviderCache):
(WebCore::CachedScript::sourceProviderCacheSizeChanged):

• loader/cache/CachedScript.h:

File:

• trunk/Source/JavaScriptCore/parser/Lexer.h (modified) (1 diff)

trunk/Source/JavaScriptCore/parser/Lexer.h

@@ -74 +74 @@
             m_buffer8.resize(0);
             m_buffer16.resize(0);
+            if (UNLIKELY(m_code == m_codeEnd))
+                m_current = -1;
         }
+        void setLineNumber(int line)
+        {
+            m_lineNumber = line;
+        }
+
+        SourceProvider* sourceProvider() const { return m_source->provider(); }
 
     private: