Hi! The code below is in working order, but it is a simpler version of what I'm actually working with. My question to you is, "What method of comparison is the fastest and least straining on memory if each of the strings were at least 1,000 unique values in length?"

I don't think using two arrays would be the most efficient use of my memory nor a hash, but I'm running out of options. Are there any better ideas?

Thanks! 

 #!usr/bin/perl5.8.8

use strict;
use warnings;

my @line1 = qw(C A B G F E);
my @line2 = qw(D B F);
#assume line 2 is always equal in size or smaller

foreach my $i (@line2)
{
    foreach my $j (@line1)
    {
    if ($i eq $j) {print "$i\n";}
    }
}

[download]

The reason this is of concern is because, I'm going to have to do this type of comparison at least 10,000 time (I'm estimating) per file.

In reply to Iterating through Two Arrays. Is there a better use of memory? by Jeri

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