Re: [PATCH] cksum: Use pclmul hardware instruction for CRC32 calculation

[Pádraig Brady]

On 13/03/2021 16:13, Pádraig Brady wrote:

FYI testing on an older i3-2310M system
shows the bottleneck is not near I/O (cat is much faster).
A 500MiB file improves from 1.40s to 0.67s on the i3-2310M.

$ time src/cksum file.in
  3404199294 524288000 file.in
  real  0m0.672s
  user  0m0.584s
  sys   0m0.084s

I'm also considering applying the attached
to add a --debug option (present on a few other coreutils),
which will diagnose the implementation used
(since it's build time and run time variable).

cheers,
Pádraig

cksum--debug.patch
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