Perl/DBI vs Native

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От Valentin Bogdanov
Тема Perl/DBI vs Native
Дата
Msg-id 768129.60859.qm@web25802.mail.ukl.yahoo.com
обсуждение исходный текст
Ответы Re: Perl/DBI vs Native  (Craig Ringer <craig@postnewspapers.com.au>)
Re: Perl/DBI vs Native  (Rusty Conover <rconover@infogears.com>)
Re: Perl/DBI vs Native  (Craig James <craig_james@emolecules.com>)
Список pgsql-performance
Hi,

I have ran quite a few tests comparing how long a query takes to execute from Perl/DBI as compared to psql/pqlib. No
matterhow many times I run the test the results were always the same. 

I run a SELECT all on a fairly big table and enabled the log_min_duration_statement option. With psql postgres
consistentlylogs half a second while the exact same query executed with Perl/DBI takes again consistently 2 seconds. 

If I were timing the applications I would have been too much surprised by these results, obviously, processing with
Perlwould be slower than a native application. But it's the postmaster that gives these results. Could it be because
theDBI module is slower at assimilating the data? 

Any light on the subject would be greatly appreciated.


Regards,

Val


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