Support in memory compression of rarely used data
https://bugs.webkit.org/show_bug.cgi?id=120143
Reviewed by Gavin Barraclough.
Source/JavaScriptCore:
Include zlib in LD_FLAGS and make UnlinkedCodeBlock make use of CompressibleVector. This saves ~200k on google maps.
- Configurations/JavaScriptCore.xcconfig:
- bytecode/UnlinkedCodeBlock.cpp:
(JSC::UnlinkedCodeBlock::expressionRangeForBytecodeOffset):
(JSC::UnlinkedCodeBlock::addExpressionInfo):
- bytecode/UnlinkedCodeBlock.h:
Source/WTF:
Adds a set of utility functions to wrap the use of zlib over a generic
type or a Vector<> as well as adding CompressibleVector that wraps
either a Vector<> or compressed data.
- GNUmakefile.list.am:
- WTF.pro:
- WTF.vcxproj/WTF.vcxproj:
- WTF.xcodeproj/project.pbxproj:
- wtf/CMakeLists.txt:
- wtf/CheckedArithmetic.h:
- wtf/Compression.cpp: Added.
(WTF::zAlloc):
(WTF::zFree):
(WTF::GenericCompressedData::create):
(WTF::GenericCompressedData::decompress):
- wtf/Compression.h: Added.
(WTF::GenericCompressedData::compressedSize):
(WTF::GenericCompressedData::originalSize):
(WTF::GenericCompressedData::GenericCompressedData):
(WTF::CompressedVector::create):
(WTF::CompressedVector::decompress):
(WTF::CompressedVector::size):
(WTF::CompressibleVector::CompressibleVector):
(WTF::CompressibleVector::shrinkToFit):
(WTF::CompressibleVector::size):
(WTF::CompressibleVector::operator[]):
(WTF::CompressibleVector::at):
(WTF::CompressibleVector::begin):
(WTF::CompressibleVector::end):
(WTF::CompressibleVector::data):
(WTF::CompressibleVector::decompressIfNecessary):
