1. Lose the parens () around a variable declaration (just my $PWD;). Edit on Abigail: this is just a style issue, unless you need the parens, i'd omit them.
2. Do not use @KeyWords, just put them in the hash as you find them: 
foreach (split (/,/,$Line))
{
  $een{$_}++;
}

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3. Declare variables as late as possible (if you want the advantages of use strict;).
4. I assume you use @DirList and @SUBDirList because you can't 'flatten' the directory structure? There is not real speed problem here but my instinct tells me to lose the two arrays and open the subdirs in a while loop of the readdir(DIR).

These are all minor items, none of them speed up the most time-consuming part.

In reply to Re: Code Efficiency by Jaap
in thread Code Efficiency by fourmi

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