Artifact 602c2459f268b957672804ff3f935eb4a499b0b2f0f3f59b09c567eb808d66bd:
std.hash.Crc32 is byte-at-a-time over one table (~350 MB/s here) and the open-time scan CRCs every payload byte, so it was ~93% of a cold open. Slicing-by-8 in its place: a 416 MB store opens in 292ms against 1.22s, warm reads run 3.3x, the write path 1.5x. Bit-identical by construction, so no format changes and no repository is affected. by dmestas on 2026-07-29 14:19:42.
C merge\slogstore-index:\schecksum\sthe\sstore\sthrough\sa\svendored\scrc32\n\nstd.hash.Crc32\sis\sbyte-at-a-time\sover\sone\stable\s(~350\sMB/s\shere)\sand\sthe\nopen-time\sscan\sCRCs\severy\spayload\sbyte,\sso\sit\swas\s~93%\sof\sa\scold\sopen.\nSlicing-by-8\sin\sits\splace:\sa\s416\sMB\sstore\sopens\sin\s292ms\sagainst\s1.22s,\nwarm\sreads\srun\s3.3x,\sthe\swrite\spath\s1.5x.\sBit-identical\sby\sconstruction,\nso\sno\sformat\schanges\sand\sno\srepository\sis\saffected. 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