Just out of curiosity, I benchmarked this.

#!/usr/bin/perl -w
use Benchmark;

$email = '<silvers@op.net>';

Benchmark::cmpthese(100000000,
    {   
        '.*'    => sub { $email =~ m/.*?\<(.*?)\>/ },
        '^>'    => sub { $email =~ m/<([^>]+)>/    }
    }
);

[download]

Results:

Benchmark: timing 100000000 iterations of .*, ^>...
        .*: 1437 wallclock secs (1432.85 usr +  0.06 sys = 1432.91 CPU
+) @ 69788.05/s (n=100000000)
        ^>: 645 wallclock secs (645.23 usr +  0.06 sys = 645.29 CPU) @
+ 154969.08/s (n=100000000)
       Rate   .*   ^>
.*  69788/s   -- -55%
^> 154969/s 122%   --

[download]

- FrankG

In reply to Re: Re: Re: Expressing myself by how do i know if the string is regular expression
in thread Expressing myself by web-yogini

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