27609670570
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Ran 16 Jun 2026 10:04AM UTC

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Build # 27609670570

Build Type

push

github

Committed by

Dead2

Commit Message

Use broadcast chunk store instead of memset for dist=1 on NEON/AVX2/AVX-512

Benchmarks show broadcasting the byte into a vector register and
falling through to the chunk store loop beats libc memset for the
short lengths common in inflate output (29-58% on AVX-512, 15-26%
on AVX2, 33% on NEON at len=8).

In 49a6bb5d, chunkmemset_1 was replaced with memset under the
assumption that libc memset would be at least as fast. According
to benchmarking, this isn't true in all cases.

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