Guys I don't know if this is like a new discovery in here or what, using the join function does actually reduce the size of a particular array, i used Devel::Size to verify this and the results I got were 160 bytes each for @list, @result when 
CASE1:
my @result = map $_*2, @list;

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and 
@result = join (',',@result);

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a meagre increase in "@result" size was reported-168 bytes, i.e. only 8 bytes when 
CASE2:
my @result = map $_*55, @list;

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and @result = join (',',@result); but when I removed the line 
@result = join (',',@result);

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I got "@result" size increasing to 290 in the first case and 296 in the second case. Here is my Code, you can change the line 6 to map $_x-> (x=any number) to appreciate this 
#!/usr/local/bin/perl
use strict;
use warnings;
use Devel::Size qw(size total_size);

my @list = qw(1 2 3 4);
my @result = map $_*55, @list;

@list = join(',',@list);
#@result = join (',',@result);

print qq(the size of "@list" is: ).total_size(\@list). " Bytes\n";
print qq(the size of "@result" is: ).total_size(\@result)." Bytes\n";

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Excellence is an Endeavor of Persistence. Chance Favors a Prepared Mind

In reply to Memory tip by biohisham

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