David Brown wrote: > I've been profiling my MySQL driven Mod_Perl website by adding debug > messages throughout the code which relays what time has elapsed since the > script was invoked (using Time::HiRes) > > Now the script is pretty whizzy, serving up complete pages in circa 0.010 > seconds. > > I got to wondering how those 0.010 were being made up. Interestingly, all > of the database access is complete within 0.002 so I thought where do the > other 0.008 come from ?
You cannot reliably measure CPU clocks with wallclock on the multi-processor machine, unless you are running on Dos :) See the performance chapter in the mod_perl guide. Also search the archives, about a year ago I've posted a subclass to DBI that measures the SQL execution profiling. I'm not sure if Tim has this functionality in the latest DBI. Though it also measures wallclock time if I remember correctly :( You best bet is to use DProf as suggested Garth. _____________________________________________________________________ Stas Bekman JAm_pH -- Just Another mod_perl Hacker http://stason.org/ mod_perl Guide http://perl.apache.org/guide mailto:[EMAIL PROTECTED] http://ticketmaster.com http://apacheweek.com http://singlesheaven.com http://perl.apache.org http://perlmonth.com/
