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由 Siying Dong 提交于
[RocksDB Performance Branch] Avoid sorting in Version::Get() by presorting them in VersionSet::Builder::SaveTo() Summary: Pre-sort files in VersionSet::Builder::SaveTo() so that when getting the value, no need to sort them. It can avoid the costs of vector operations and sorting in Version::Get(). Test Plan: make all check Reviewers: haobo, kailiu, dhruba Reviewed By: dhruba CC: nkg-, igor, leveldb Differential Revision: https://reviews.facebook.net/D14409
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