my @Fn = qw' bigfile1.txt bigfile2.txt ';
open my $f1, '<', $Fn[0] or die "$Fn[0] $!";
open my $f2, '<', $Fn[1] or die "$Fn[1] $!";
while( defined(my $l1 = <$f1>) && defined(my $l2 = <$f2>)) {
# chomp here, but only if necessary
print "line $. is ", $l1 cmp $l2 ? "different!" : "identical!", "
+\n"
}
close $f1, close $f2;
Regards mwa
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