From: Owen <[EMAIL PROTECTED]> > My first foray into Benchmark with the code below produced these > results; > > The file is 22000 lines, and there are 2 matches in the file. > > [EMAIL PROTECTED] PerlScripts]$ perl benchmark.pl > > Regex with modifer > YES > YES > timethis 1000000: 5 wallclock secs ( 4.84 usr + 0.50 sys = 5.34 > CPU) @ 187265.92/s (n=1000000) > > Regex without modifer > YES > YES > timethis 1000000: 7 wallclock secs ( 4.75 usr + 0.57 sys = 5.32 > CPU) @ 187969.92/s (n=1000000) > > It would seem to me that the /o modifier makes little difference, or > is it that I am using the modifer incorrectly or even using Benchmark > incorrectly?
There are two reasons why do you see such a small difference. 1) The regexp is very very simple. Try to change $name to 'S(?:T.[lL]|TALE?)'. This should make the difference bigger. 2) The script spends a lot of time in reading the file. Try to read the whole file into an array first and then benchmark matching the items of the array. Jenda ===== [EMAIL PROTECTED] === http://Jenda.Krynicky.cz ===== When it comes to wine, women and song, wizards are allowed to get drunk and croon as much as they like. -- Terry Pratchett in Sourcery -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
