Question about srcbody in VCL_conf
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Jul 31 11:37:16 CEST 2012
In message <5017A456.7090905 at unister-gmbh.de>, Gordon Schmidt writes:
>> It sounds really strange that this should have the performance
>> effect you claim...
>I didn't get the 8%-10% by minifying - the performance gain with
>minified vcls is lower.
>Just for testing, I removed the part in the vcc_compile.c responsable
>for adding scrbody to the compiled object to get the full performance
>improvement.
The only thing you have done is remove the memory footprint by a
few kilobytes.
If that radically changes your performance it can only be because
it allows you to operate entirely inside the L1/L2/L3 cache of your
CPU.
That would indicate that your benchmark is so trivially simple that
it is invalid for any realistisk workload with more than one URL.
>
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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