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

From:	Robert Haas <robertmhaas(at)gmail(dot)com>
To:	Andres Freund <andres(at)anarazel(dot)de>
Cc:	pgsql-hackers(at)postgresql(dot)org
Subject:	Re: [RFC][PATCH]: CRC32 is limiting at COPY/CTAS/INSERT ... SELECT + speeding it up
Date:	2010-05-21 03:40:03
Message-ID:	AANLkTikqy8DmqU2WNlDRuFpiKOr_BLEAxkJbvKO-sqsE@mail.gmail.com
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On Thu, May 20, 2010 at 4:27 PM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> I looked a bit around for faster implementations of CRC32 and found one in
> zlib. After adapting it (pg uses slightly different computation (non-
> inverted)) I found that it increases the speed of the CRC32 calculation itself
> 3 fold.

But zlib is not under the PostgreSQL license.

...Robert

In response to

[RFC][PATCH]: CRC32 is limiting at COPY/CTAS/INSERT ... SELECT + speeding it up at 2010-05-20 20:27:48 from Andres Freund

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Re: [RFC][PATCH]: CRC32 is limiting at COPY/CTAS/INSERT ... SELECT + speeding it up at 2010-05-21 05:11:34 from Andres Freund

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