Re: Re: [RFC][PATCH]: CRC32 is limiting at COPY/CTAS/INSERT ... SELECT + speeding it up

From: "Pierre C" <lists(at)peufeu(dot)com>
To: "Andres Freund" <andres(at)anarazel(dot)de>, "Greg Stark" <gsstark(at)mit(dot)edu>
Cc: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Bruce Momjian" <bruce(at)momjian(dot)us>, pgsql-hackers(at)postgresql(dot)org, singh(dot)gurjeet(at)gmail(dot)com
Subject: Re: Re: [RFC][PATCH]: CRC32 is limiting at COPY/CTAS/INSERT ... SELECT + speeding it up
Date: 2010-06-07 10:37:13
Message-ID: op.vdxegbnreorkce@apollo13
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> On Sunday 30 May 2010 18:29:31 Greg Stark wrote:
>> On Sun, May 30, 2010 at 4:54 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> > I read through that thread and couldn't find much discussion of
>> > alternative CRC implementations --- we spent all our time on arguing
>> > about whether we needed 64-bit CRC or not.

SSE4.2 has a hardware CRC32 instruction, this might be interesting to
use...

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