Your code here:
@{$sets{$fasta_id}[$setscounter]{$sitekey}} = ();
foreach ( sort @{$matches{$fasta_id}{$sitekey}} ) {
    last if $_ > $upperlimit;
    next if $_ < $lowerlimit;
    push @{$sets{$fasta_id}[$setscounter]{$sitekey}}, $_;

[download]

Looks a lot like my original code, in the first bit, here:
for my $hit (@{$matches{$fasta_id}{$sitekey}}) {
            next unless ($hit >= $lowerlimit);
            last unless ($hit <= $upperlimit);
            my $ggg = $hit + 0;
            push (@arrayA, $ggg);

[download]

And indeed, it does have a speed advantage. I don't need the sort, as the elements are already sorted in numerical order, so I can (and do) leave that out. As for knowing thy data, this here's the tricky part. I am going through the numbers in the arrays, and basically setting aside clusters of EVERY group of numbers $span distance apart. Starting from the lowest element, and proceeding all the way to the highest. So, how many elements there are above $upperlimit is as variable as possible. It goes from all to none.

Thanks for the input, though.
Matt

In reply to Re^2: Help tightening up a subroutine please by mdunnbass
in thread Help tightening up a subroutine please by mdunnbass

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.