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FoxtrotUniform,
The trouble with selecting a single number to benchmark from is that it may favor one method over the other. With this in mind, I created another rudimentary benchmark that shows the two methods are fairly equal:

First generate 5,000 random numbers between 1 .. 5_000_000

$ cat gen_targets.pl #!/usr/bin/perl use strict; use warnings; my $file = $ARGV[0] || 'targets.txt'; open (OUTPUT, '>', $file) or die "Unable to open $file for writing : $ +!"; print OUTPUT int rand 5_000_000, "\n" for 1 .. 5_000;

Next, I just modified our 2 scripts as follows:

my $file = $ARGV[0] || 'targets.txt'; open (INPUT, '<', $file) or die "Unable to open $file for reading : $! +"; while ( <INPUT> ) { chomp; get_three( $_ ); # used your sub/calling convention }

And finally, the results:

$ time ./lr.pl real 1m0.706s user 1m0.416s sys 0m0.080s $ time ./fu.pl real 1m0.791s user 1m0.326s sys 0m0.220s
I haven't spent any time thinking about optimizations, but if I come up with any tomorrow I will post it along with a "real" benchmark.

Cheers - L~R


In reply to Re^2: Triangle Numbers Revisited by Limbic~Region
in thread Triangle Numbers Revisited by Limbic~Region

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