Well, that should tell you something. :)

There is no way to predict it with any accuracy. I think the perlfaq spells this out pretty clearly too. What you have to do is run your program with your real data, see how big it is, and then make changes and repeat.

There are some common culprits for large programs, and I believe they are all described in those docs, as well as ways of measuring the size of a running program. There's way to measure the size of a non-running program. It is very data dependent.

In reply to Re^5: A way to see how much 'memory' a program will take up in, say, mod_perl, so I can start to optimize it? by perrin
in thread A way to see how much 'memory' a program will take up in, say, mod_perl, so I can start to optimize it? by MashMashy

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.