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Re: [PATCH v2 1/3] autoconf: prefer an unrolled loop for trivial AC_CHEC
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From: |
Paolo Bonzini |
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Subject: |
Re: [PATCH v2 1/3] autoconf: prefer an unrolled loop for trivial AC_CHECK_FUNCS |
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Date: |
Wed, 2 Nov 2016 22:32:50 +0100 |
Il 02/nov/2016 22:27, "Eric Blake" <address@hidden> ha scritto:
> I tested this with coreutils. Timing wise, on my system, I was able to
> consistently see a reduction of './config.status --recheck' execution
> time from around 34.3s pre-patch, to around 33.9s post-patch; a little
> better than 1%. That's not huge, but big enough that I can say it is a
> real improvement and not just measurement noise.
This makes sense, since I got 3% from the while series of three. Your measurements still have the cat(1) fork for AC_DEFINE_UNQUOTED, for example.
Paolo