Once again, a very small test where I replaced the Pattern.compile in RegexpTranslator into a getPattern which saves all earlier patterns in a hashmap. This actually worsens the performance slightly, so that's probably not the right way to go. I will try to apply this approach to the whole RegexpTranslator.translate method instead and see what happens.
Regards Ola Bini ----- Original Message ----- From: Ola Bini <[EMAIL PROTECTED]> Date: Saturday, April 8, 2006 10:53 am Subject: [Jruby-devel] Regexp performance. To: jruby-devel@lists.sourceforge.net > Hi there, > > I made a highly unscientific test of performance of regexps in Ruby > compared to JRuby. > The attached script is what I used to test this. The output is as > follows for 100 000 repetitions of the same regexp applying: > D:\Project\jruby>ruby testRegexpPerformance.rb > Time1 0.201 for sum 150000 > Time2 0.22 for sum 150000 > > D:\Project\jruby>bin\jruby testRegexpPerformance.rb > Time1 5.698 for sum 150000 > Time2 3.986 for sum 150000 > > This seems fairly good, actually, we're only an order of magnitude > slower, which is not so bad if you think about all the stuff that's > going on. The difference between Time1 and Time2 is what happens if I > save the regexp in a variable before the loop, or not. As you can see, > we could save pretty much performance here. > > Regards > Ola Bini > ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Jruby-devel mailing list Jruby-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jruby-devel
