On 1 Jun 2011, at 11:57, Dave Lambley wrote: > > My former employer did some benchmarking of different versions of Perl, used inside mod_perl. Perl 5.10.x proved faster than 5.8.x, and 64 bit was faster than 32. This was for a CPU bound application though, which it sounds like your's is not. Bear in mind 64 bit mod_perl has a much larger memory footprint...