$new_guy:

A couple observations:

  1. You're reading a file inside a loop, so you can potentially read and discard it a large number of times. Perhaps it would be better to store the data and simply reuse it?
  2. You've got some nested loops: the number of times you execute the code in the innermost loop is typically the product of the number of iterations of each loop. So you need to:

Of course, this is assuming that you've run the appropriate profiling tools and determined that the nested loops are your problem. (Don't optimize what isn't a problem.)

...roboticus

When your only tool is a hammer, all problems look like your thumb.


In reply to Re: file comparisons: - making it faster by roboticus
in thread file comparisons: - making it faster by $new_guy

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.