Interesting. In Unix, you can allocate memory using an anonymous mmap, then return it to the system with munmap. You can do that by hand if you want, packing data into the allocated region, then unpacking it back out when you need it.

This is horribly inconvenient, of course. I wonder if an XS module could use mmap to allocate a big chunk of memory and instruct Perl's allocator to use it, then later free this memory and tell Perl to use the normal allocator. I don't know anything about Perl internals, so I shouldn't be speculating like this, but it's so much fun. :)

In reply to Re: Re: Re: Re: Memory usage breakup by sgifford
in thread Memory usage breakup by eXile

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.