Using threads is only useful if you need to communicate between threads in real time. Otherwise fork-&-exec is a better solution. Why? Various drawbacks to threads, like possible memory gains over time, if a thread dies, it takes down the whole batch, and other inefficiencies. Reusing threads and the downloader packages will help in a long running threaded program. You might want to look at Reusable threads demo .

A forked solution is good, because all memory is released back to the system when the forked process ends. See LWP::Parallel::UserAgent and Parallel::ForkManager. You can also search for scripts using these on groups.google.com.

Anyways, before you think threads have solved your problem, watch it's memory usage as it runs. If it slowly gains, you have a problem with it.

I'm not really a human, but I play one on earth CandyGram for Mongo

In reply to Re: Threading - Conceptual Question About Use Of Array by zentara
in thread Threading - Conceptual Question About Use Of Array by ~~David~~

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.