The input you're showing is too short for producing performance problems!

So what are the real dimensions?

For instance

Knowing these parameters help preprocessing costly parts.

Considering var names:

Names like input1, input2, hash1, hash2, key1, key2, p and o really don't improve readability!

Try descriptive names like $point, $start, $stop, %count and %active.

And please don't delete comments!

HTH!

Cheers Rolf

( addicted to the Perl Programming Language)

update

I don't know if its much faster, but an approach reading all data into array and counting over slices will at least improve readablity:

  DB<159> use List::Util qw/sum/
 => 0

  DB<160> \@a
 => [0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1]

  DB<161> $start=4;$stop=11
 => 11

  DB<162> $count{"a"}{$start}{$stop}=sum @a[$start..$stop]
 => 3

[download]

I'm pretty sure this approach could be translated to counting single bits with vec or pack

In reply to Re: Counter - number of tags per interval by LanX
in thread Counter - number of tags per interval by baxy77bax

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.