David Turner <dtur...@twopensource.com> writes:
> Optimize check_refname_component using SSE2 on x86_64.
>
> git rev-parse HEAD is a good test-case for this, since it does almost
> nothing except parse refs. For one particular repo with about 60k
> refs, almost all packed, the timings are:
>
> Look up table: 29 ms
> SSE2: 23 ms
>
> This cuts about 20% off of the runtime.
>
> Ondřej Bílka <nel...@seznam.cz> suggested an SSE2 approach to the
> substring searches, which netted a speed boost over the SSE4.2 code I
> had initially written.
>
> Signed-off-by: David Turner <dtur...@twitter.com>
> ---
When applied on top of your dde8a902 (refs.c: optimize
check_refname_component(), 2014-06-03), this seems to fail t1402 for
me.
Test Summary Report
-------------------
t1402-check-ref-format.sh (Wstat: 256 Tests: 93 Failed: 9)
Failed tests: 28, 36, 38, 40, 63, 75, 77, 85-86
Non-zero exit status: 1
#28 is the one that runs "check-ref-format heads/v@{ation".
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