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You said you build the regex and pass it to the program as a parameter ... how do you use it then?

my $regexp = @ARGV[1]; ... next if ($global =~ /$regexp/); ...
my $regexp = @ARGV[1]; ... next if ($global =~ /$regexp/o); ...
my $regexp = qr/@ARGV[1]/; ... next if ($global =~ $regexp); ...

The first version compiles the regexp each time you use it, the other two just once. For a longer regexp this may make a big difference.

Jenda
Enoch was right!
Enjoy the last years of Rome.


In reply to Re: Speed of Perl Regex Engine by Jenda
in thread Speed of Perl Regex Engine by Clovis_Sangrail

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