LevelDB-course-Lab

136 커밋

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작성자	SHA1	메시지	날짜
costan	eb4f0972fd	leveldb: Fix compilation warnings in port_posix_sse.cc on x86 (32-bit). LE_LOAD64 is only used when _mm_crc32_u64 is available, on 64-bit x86 processors. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=148906169	7 년 전
costan	ea175e28f8	Implement support for Intel crc32 instruction (SSE 4.2) This change authored by vadimskipin and submitted via: https://github.com/google/leveldb/pull/309 Changes made to support iOS builds and other architectures without support for SSE 4.2. db_bench reports original crc32 speed at: crc32c : 3.610 micros/op; 1082.0 MB/s (4K per op) with this change performance has increased to: crc32c : 0.843 micros/op; 4633.6 MB/s (4K per op) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=148694935	7 년 전

작성자

SHA1

메시지

날짜

costan

eb4f0972fd

leveldb: Fix compilation warnings in port_posix_sse.cc on x86 (32-bit).

LE_LOAD64 is only used when _mm_crc32_u64 is available, on 64-bit x86 processors.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=148906169

7 년 전

costan

ea175e28f8

Implement support for Intel crc32 instruction (SSE 4.2)

This change authored by vadimskipin and submitted via:

    https://github.com/google/leveldb/pull/309

Changes made to support iOS builds and other architectures
without support for SSE 4.2.

db_bench reports original crc32 speed at:

    crc32c : 3.610 micros/op; 1082.0 MB/s (4K per op)

with this change performance has increased to:

    crc32c : 0.843 micros/op; 4633.6 MB/s (4K per op)

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=148694935

7 년 전

2 커밋 (471f0b84ec3420c7565511eb6e2fee8e0a0550e8)