From: | Gianni Mariani <gianni(at)mariani(dot)ws> |
---|---|
To: | gearond(at)cvc(dot)net |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Sorting Problem |
Date: | 2003-08-13 18:15:03 |
Message-ID: | 3F3A8027.6080905@mariani.ws |
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Thread: | |
Lists: | pgsql-general |
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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