The benchmark module is a great tool to know the time the code takes to run. The output is usually in terms of CPU time. This module provides us with a way to optimize our code. With the advent of petascale computing and other multicore processor it is becoming a neccesity to know about the CPU time taken by our perl program.
This is the simple way to use the module
Example1:
use Benchmark;
$first_time = Benchmark->new;
our code……
$second_time = Benchmark->new;
$final_difference = timediff($first_time,$second_time);
print “the code took, timestr($final_difference),”\n”;
that was a very simple way to know the time diff , we can use it to know the time taken by some part of the code in the program.
More sophisticated way:
use Benchmark;
sub first {my(arguments) = @_;
}
timethese(100, { first => ‘first_sub(arguments)’});
The first argument to timethese is 100 (evaluate 100 times).
Hope this very small tutorial with Benchmark will help people get started.
