hi there, i am a new perl person, but did a lot of php.

i am writing a web log parsing thingie. it is looking for a couple of regexes and counts some stuff, really simple. on a 200M logfile, it takes around 8.35s real 8.20s user 0.14s system with ONE $mask. as soon as i put 2 or more, the time goes over 100s... i tried to profile, but -d:DProf does not profile builtins.

the script is "learning" the filenames in a particlar path, and pushing them on the array. so before the pushing it checks if there is already a file with the same name. 

$ cat test.pl
use strict;
use File::Basename;

my @count = ();
my @mask = (
        '/some/path/',
        'some/other/path',
        'another/path',
);

open F, "access.log";

while (<F>) {
        chomp;

        foreach my $m (@mask) {
                my $regex = "GET.*" . $m . ".*HTTP/1.1\" 200 [0-9].*";

                if (/$regex/) {
                        s/.*GET //;
                        s/ HTTP.*//;

                        my $bn = basename($_);
                        my $found = 0;

                        foreach (@count) {
                                if ($_->[0] eq $bn) {
                                        $_->[1]++;
                                        $found = 1;
                                        last;
                                }
                        }

                        if ($found == 0) {
                                push @count, [ $bn, 1 ];
                        }
                }
        }
}

foreach (@count) {
        print "$_->[0] = $_->[1]\n";
}

close F;

[download]
(all this on red hat ES3)

In reply to log parsing very slow by Anonymous Monk

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