You could use Time::HiRes for accurate time measuring: 
use Time::HiRes qw(gettimeofday);

print "Press return: ";
my $before = gettimeofday;
<>;
my $elapsed = gettimeofday - $before;
print "you took $elapsed seconds\n";

[download]
(code taken from the Perl-Cookbook)

---- kurt

In reply to Re: Experiment Design by amphiplex
in thread Experiment Design by aufrank

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