Why is memory not freed for a string 'foo' assignment, but is freed for a number asignment ?
Because numbers are fixed length and so fit directly into the SV struct while strings are variable length and so are separately malloc()ed with a pointer stored in the SV struct.

I'm a bit surprised that it only grows by 4 bytes. It would be a bit interesting to make the string slightly longer and see how many bytes get added per iteration.

But if upgrading Perl just makes the problem go away, then someone probably already ran down this particular bug and so repeating their work probably isn't worthwhile.

Perhaps a long shot, but there was also a problem where certain types of temporary values were not free until a loop was exitted.

        - tye (but my friends call me "Tye")

In reply to (tye)Re2: Perl Memory Leak ?? by tye
in thread Perl Memory Leak ?? by eformat

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.