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

From Kenneth Marshall
Subject Re: New CRC algorithm: Slicing by 8
Date
Msg-id 20061023215218.GI6179@it.is.rice.edu
Whole thread Raw
In response to Re: New CRC algorithm: Slicing by 8  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
On Mon, Oct 23, 2006 at 05:23:27PM -0400, Tom Lane wrote:
> 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.
> 

I can believe that not re-building GCC 4.1.x with the 4.1.x compiler
could result in it not taking full advantage of new features and functions.

Ken


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