Mark Kirkwood wrote:
Tom Lane wrote:
Are you running similar gcc versions on both? I realize I forgot to
document what I was using:
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....
Here are the results after building gcc 4.1.2 (repeating results for gcc
3.4.6 for comparison). I suspect that performance is probably impacted
because gcc 4.1.2 (and also the rest of the tool-chain) is built with
gcc 3.4.6 - but it certainly suggests that the newer gcc versions don't
like the slice-8 algorithm for some reason.
Std crc Slice-8 crc
Intel P-III 1.26Ghz (FreeBSD 6.2 gcc 3.4.6)
8192 bytes 12.975314 14.503810
1024 bytes 1.633557 1.852322
64 bytes 0.111580 0.206975
Intel P-III 1.26Ghz (FreeBSD 6.2 gcc 4.1.2)
8192 bytes 19.516974 29.457739
1024 bytes 2.448570 3.742106
64 bytes 0.112644 0.335292
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