A fork makes a copy of the data portion of the process, but uses the same code portion, so the number of subs won't affect fork performance

fork doesn't copy anything. Individual memory pages get copied the first time they are changed after a fork. But maybe you were talking abstractly and meant they wouldn't eventually get copied. I don't think that's true either.

Specifically, I'm pretty sure some fields of some ops change during execution (Upd: I'm not so sure anymore ), and I don't think there's any attempt to keep the ops in a separate memory page from variables that may change. Even if ops were sequestered into their own memory page, loading a module or otherwise compiling code after the fork would change the page.

Update: Cleaned up phrasing. Added last sentence.

In reply to Re^2: Fork and multiple subs by ikegami
in thread Fork and multiple subs by msalerno

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.