| From: | Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | mark(at)mark(dot)mielke(dot)cc, Gurjeet Singh <singh(dot)gurjeet(at)gmail(dot)com>, PGSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: New CRC algorithm: Slicing by 8 |
| Date: | 2006-10-23 06:01:41 |
| Message-ID: | 453C5AC5.9060504@paradise.net.nz |
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| Lists: | pgsql-hackers |
Tom Lane wrote:
> Mark Kirkwood <markir(at)paradise(dot)net(dot)nz> writes:
>> Interesting that the slice-8 algorithm seems to work noticeably better
>> on FreeBSD than Linux -
>
> Are you running similar gcc versions on both? I realize I forgot to
> document what I was using:
>
> HPPA: gcc version 2.95.3 20010315 (release)
> PPC: gcc version 4.0.1 (Apple Computer, Inc. build 5363)
> both Intels: gcc version 4.1.1 20060525 (Red Hat 4.1.1-1)
>
> Interesting that it's only the oldest-line tech that's showing a win
> for me ...
>
>
Ah - good point, FreeBSD is using an older compiler:
FreeBSD: gcc (GCC) 3.4.6 [FreeBSD] 20060305
Linux: gcc (GCC) 4.1.1 (Gentoo 4.1.1)
Hmm - there is a FreeBSD port for 4.1.2, I might set that off to build
itself and see if compiling with it changes the results any....
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