Looking again I see you're right.
But still, rather than invoking the regex engine 50,000 times, better to search for the position of the 50,000th ! and then replace in one pass.
#! perl -slw
use strict;
use Time::HiRes qw[ time ];
my $s = '1234!' x 55e3;
my $start = time;
my( $p, $c ) = ( 0, 50e3 );
1 while --$c and $p = 1+ index $s, '!', $p;
substr( $s, 0, $p ) =~ tr[!][\n];
printf "Took %f seconds\n", time() - $start;
__END__
C:\test>junk71;;
Took 0.011771 seconds
C:\test>junk71;;
Took 0.009690 seconds
That could probably be sped up with a binary chop for the position, but it hardly seems worth it.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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