So, I am looking to speed things up.

You are almost certainly barking at the wrong tree.

You seem to be assuming that passing/copying large scalars makes much difference to runtime. Memory use sure. Runtime - not really, only if you get into swap.

I will almost guarantee you that 99% of your runtime is spent in LWP - getting (waiting) the data.

I would suggest Benchmarking before you try to optimise an area that probably has nothing at all to do with your speed issue.

Assuming that I am right the easiest practical solution is to split your code into GET and a MUNGE units - this also makes the Benchmark a breeze. Anyway you will typically want to run 10-100 parallel LWP agents to pull down data as fast as your bandwidth/the target servers will deliver it. LWP::Parallel::UserAgent will probably be a lot more useful than LWP::Simple. Note don't accidentally implement a DOS attack on your target servers. First it is not nice. Second, some firewall implementations will lock your Agent/IP out if you hit it too hard.

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print

In reply to Re: Re: Re: Memory Use and/or efficiency passing scalars to subs by tachyon
in thread Memory Use and/or efficiency passing scalars to subs by knexus

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.