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Re: New CRC algorithm: Slicing by 8 - Mailing list pgsql-hackers

From Tom Lane
Subject Re: New CRC algorithm: Slicing by 8
Date
Msg-id 28781.1161638607@sss.pgh.pa.us
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In response to Re: New CRC algorithm: Slicing by 8  (Mark Kirkwood <markir@paradise.net.nz>)
Responses Re: New CRC algorithm: Slicing by 8  (Mark Kirkwood <markir@paradise.net.nz>)
Re: New CRC algorithm: Slicing by 8  (Kenneth Marshall <ktm@it.is.rice.edu>)
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Mark Kirkwood <markir@paradise.net.nz> writes:
> Right - I think the regression is caused by libc and kernel being built 
> with gcc 3.4.6 and the test program being built with gcc 4.1.2. 

Why do you think that?  The performance of the CRC loop shouldn't depend
at all on either libc or the kernel, because they're not invoked inside
the loop.
        regards, tom lane

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