On 12/8/06, H. Peter Anvin <hpa@zytor.com> wrote:
quoted text
> Linus Torvalds wrote:
> > I could write a simple C caching thing that just hashes the CGI arguments
> > and uses a hash to create a cache (and proper lock-files etc to serialize
> > access to a particular cache object while it's being created) fairly
> > easily, but I'm pretty sure people would much prefer a mod_perl thing just
> > to avoid the fork/exec overhead with Apache (I think mod_perl allows
> > Apache to run perl scripts without it), and that means I'm not the right
> > person any more.
>
> True about mod_perl.  Haven't messed with that myself, either.
> fork/exec really is very cheap on Linux, so it's not a huge deal.

In the case of Perl scripts, it's not really the fork/exec overhead,
but the Perl startup overhead that you want to try to optimize.  But
given your later statement (lots of spare cpu), this ends up just
being a bit of a latency hit.   In general, I think mod_perl has a
much bigger impact when you have a database to connect to at startup.
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