Re: [ic] Interchange and threaded Perl

[Bill Eichin <suppressed>]

In my server, I use /usr/local/bin/perl for Interchange; /usr/bin/perl 
is maintained by the package manager.


Henry Hartley wrote:

> On: Mon, June 06, 2005 12:48 PM, Mike Heins said:
>  
>
> > > Quoting Kaare Rasmussen (suppressed):
> > >      
> > >
> > > > > It's a shame not only because of Interchange, but because
> > > > > *every* Perl program runs 15-30% slower and because about .01%
> > > > > of code uses the features.
> > > > >          
> > > > Where do you have those numbers from?
> > > >
> > > > It's not that I doubt them. I just would like to see if they've
> > > > tested various applications to see where the penalty is biggest.
> > > >        
> > > Just benchmarks of running ab against Interchange and test code
> > > against a threaded Perl. I had an email discussion with the Debian
> > > Perl port maintainer, and he confirmed the slowdown.
> > >
> > > The more subroutine calls you have, the worse it will be, so in
> > > all liklihood object-oriented packages with lots of method-based
> > > accessors will get hit hardest.
> > >      
>
> Can you give some idea of how big a hit we're talking about?  In my
> case, I've got a Fedora Core 3 web server and only use Interchange on
> one site.  That site is small and very (VERY) low volume and I'd be
> willing to put up with it not being particularly fast.  It would
> certainly make my life a lot easier if I had the option to use the
> threaded perl that I get with FC3.  Yes, I can (and did) replace the
> perl with a non-threaded perl.  Then I had to replace some of the
> modules with non-threaded versions.  Keeping track of that is a pain.
> Not the end of the world but certainly I'd be willing to put up with a
> little slowdown on this one site to avoid that.  Or would a threaded
> perl make it really, REALLY slow?  Alternatively, I could switch distros
> but that seems like even more work that what I've already done.
>
> Would it be possible, instead of requiring non-threaded perl, to change
> the installation of Interchange to warn (even warn strongly and require
> a switch) before installing in a threaded perl environment?  Or is that
> more trouble than what I go through to manage my Perl?
>
>  

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