Re: Pl/Perl function: Speed of the First time executing pl/perl function in connection;

Tom Lane wrote:
> I wrote:
>
>> On my Fedora 9 machine, the overhead to start plperl seems to be about
>> 40 msec. This compares unfavorably to the time to start perl from the
>> command line, which is under 4 msec. I see that /usr/bin/perl pulls in
>> libperl.so, so it's paying the same shlib overhead as we do. How is it
>> that we take ten times longer to start up?
>>
>
> The above number was for plperl in a SQL_ASCII database.
> Some more data points:
>
> plperl plperlu
>
> SQL_ASCII 40 18
> UTF8 67 18
>
> which leads to the conclusion that those random little startup things
> plperl does are just unbelievably expensive.
>
>
>

I suspect much of this time is taken in loading perl modules, (strict,
Safe, utf8, SPI among others), not in anything very special that we do.:

andrew(at)constanza plperl]$ time perl -e ';'

real 0m0.004s
user 0m0.003s
sys 0m0.001s
[andrew(at)constanza plperl]$ time perl -e 'use strict; use Safe;use utf8;'

real 0m0.053s
user 0m0.016s
sys 0m0.007s

cheers

andrew