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Add an instruction about SSE in INSTALL.md
Summary: As tittle. Test Plan: Not needed Reviewers: MarkCallaghan, ljin, yhchiang, igor Reviewed By: igor Subscribers: rven, leveldb Differential Revision: https://reviews.facebook.net/D24231
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@ -15,6 +15,10 @@ There are few options when compiling RocksDB:
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* `make all` will compile our static library, and all our tools and unit tests. Our tools
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depend on gflags. You will need to have gflags installed to run `make all`.
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* if Intel SSE instruction set is supported, set USE_SSE=" -msse -msse4.2 " to make sure
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SSE4.2 is used to speed up CRC32 when calculating data checksum.
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## Dependencies
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* You can link RocksDB with following compression libraries:
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