"ITAGAKI Takahiro" <[EMAIL PROTECTED]> writes:

> "Guillaume Smet" <[EMAIL PROTECTED]> wrote:
>> It's better but still slower than 8.2.
> It probablly comes from 'var-varlena' feature in 8.3. Now we store
> text fields in a compact format on disks and extract them on access.
> It consumes some CPU cycles. If all of data are in buffer cache
> and the encoding of database is single-byte encodings, the performance
> of LIKE in 8.3 was 10-20% slower than 8.2 on my tests.

Hm, it does seem I missed like.c when I converted all the text operators to
avoid detoasting packed varlenas. I'll send a patch in a few minutes to do
that. I'm surprised it would have such a large effect though.

  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com

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