First of all, use qr// to precompile your patterns:

my @compiled_patterns = map { qx/$_/ } @matcharray;

[download]

Also don't slurp the file into an array. Use something more memory-efficient:

OUTER: while (my $line = <$file>) {
  INNER: for my $pattern (@compiled_patterns) {
    print $line, last INNER if $line =~ $pattern;
  }
}

[download]

Cheers, Flo

In reply to Re: Usage of grep on a file by rafl
in thread Usage of grep on a file by tsk1979

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