From: Ruby Newbee <rubynewbee@...>
Date: 2010-01-04T18:22:24+09:00
Subject: Re: Is ruby's regex slower?

On Mon, Jan 4, 2010 at 5:07 PM, Ayumu Aizawa <ayumu.aizawa@gmail.com> wrote:
> Hi Jenn.
>
> Its interested ;)
>
> How's it?
>


Thanks for the reminding, I got your meanings.
This time I used a compiled regex for both ruby and perl, the speed is
still different:


# cat regex_compile.rb
#!/usr/bin/ruby

regex = /href="http:\/\/(.*?)\/.*" target="_blank"/

File.open("index.html") do |f|
  f.each_line do |c|
    puts $1 if c =~ regex
  end
end


# cat regex_compile.pl
#!/usr/bin/perl

open HD,"index.html" or die $!;
while(<HD>) {
    print $1,"\n" if /href="http:\/\/(.*?)\/.*" target="_blank"/o;
}
close HD;


# time ruby regex_compile.rb > /dev/null

real    0m0.011s
user    0m0.008s
sys     0m0.004s


# time perl regex_compile.pl > /dev/null

real    0m0.003s
user    0m0.000s
sys     0m0.000s