Thank you for your answer. I have another problem. I'm trying to find the data size which causes the algorithm to take at least 15 minutes. I do the following: 
open (DATASET_RANDOM_INTEGER, '<DATASET_RANDOM_INTEGER.dat');
@numbers = <DATASET_RANDOM_INTEGER>;
close (DATASET_RANDOM_INTEGER);

#MEASURE THE TIME DURING WHICH THE ALGORITHM IS PERFORMED
#START
$start = Benchmark->new;

#RUN THE ALGORITHM
@sorted_numbers = sort { $a <=> $b } @numbers;

#FINISH
$end = Benchmark->new;
$diff = timediff( $end, $start );

[download]
However, it's too time consuming since for example when I increase the input size to 100 million, I couldn't foresee that how long it will take to finish (As I write these message, it has been running for two hours). What is the way of accelerating the execution of my code so that it uses more CPU at a time unit?

In reply to Re^2: How to generate test data? by abdullah.yildiz
in thread How to generate test data? by abdullah.yildiz

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