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sybperl-l Archive
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From: Doug Fairclough <kensey at wired dot com>
Subject: Re: Perl5 startup speed
Date: Mar 17 1996 1:25AM
On Sat, 16 Mar 1996, T. Kim Nguyen wrote:
> > The bad news is that the startup time for perl5 is significantly
> > longer than perl4! Since the scripts are running in response to a web
> > browser,adding 3-7 seconds to a 1 second script is quite noticable.
> >
> > Using some 1 or 2 line scripts of basically print "$0 :" with
> > or without require/use, we get these times:
> >
> > hello.4: 0s real 0.000s user 0.030s system
> > sybperl.4: 1s real 0.070s user 0.100s system 0%
> > hello.5: 0s real 0.030s user 0.030s system
> > sybperl.5: 2s real 1.170s user 0.260s system 50%
> > dblib.5: 1s real 0.240s user 0.090s system 0%
> > ctlib.5: 7s real 1.010s user 0.150s system 14%
>
what is the hardware platform you are running on ? are there a lot
of process swaps occuring on the machine you running on when you kick
you program off ? is vhand going crazy ? it sounds like a hardware
problem, not a software problem.
maybe this happens in perl5 and not in perl4 due to the dynamic libraries
it may be trying to load. i guess ... but it should only load what you
are referencing, not the whole wad.
> Could you write a Perl client that connects to a persistent Perl
> server (the server would be the one using CT-Lib)? That way you start
> the slow-starting server just once and have fast clients reacting to
> user queries.
>
you could, and we have, but what we are optimizing for is the time is
takes to open a connection to a backend Sybase server. This is about
a second.
doug
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