Re: Sorting Problem

From: Dennis Gearon <gearond(at)cvc(dot)net>
To: Gianni Mariani <gianni(at)mariani(dot)ws>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Sorting Problem
Date: 2003-08-13 18:30:07
Message-ID: 3F3A83AF.10603@cvc.net
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How did you solve the problem .......... :-)

Gianni Mariani wrote:

> Dennis Gearon wrote:
>
>> I agree with all of that except for one caveat:
>>
>> all my reading, and just general off the cuff thinking, says that
>> processing variable width characters SIGNIFICANTLY slows an
>> application. It seems better to PROCESS fixed width characters (1,2,4
>> byte), and TRANSMIT variable width characters (avoiding the null
>> problem.)
>
>
>
> I can and have solved that problem. If you can assume utf-8 encoding
> then there are available to you a bunch o tricks that takes this problem
> away.
>
> The other problem with memory (and hence cache) utilization of a wide
> char only solution it far more significant.
> Cache effects are the primary killer for performance in an app like a
> database.
>
> Anyhow, before making any "decisions" one should do a bunch of analysis.
>
> Cheers
> G
>
>
>
>

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