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Re: patch: fix performance problems with repated decomprimation of varlena values in plpgsql - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: patch: fix performance problems with repated decomprimation of varlena values in plpgsql
Date
Msg-id 1290539890-sup-3667@alvh.no-ip.org
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In response to Re: patch: fix performance problems with repated decomprimation of varlena values in plpgsql  (Pavel Stehule <pavel.stehule@gmail.com>)
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Excerpts from Pavel Stehule's message of lun nov 22 10:01:23 -0300 2010:

> sorry - it is related to tests from FOR-IN-ARRAY thread

> test query: select avg(array_upper(filter02(x,'%AA%', 10),1)) from t1000;

Yeah, I can measure a 25x improvement in that test with the patch
applied.

-- 
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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