Since the if block is only entered about 20000 times, changes there aren't likely to make a big difference.

But yes, seeing what kind of patterns these are would provide some clues. If they are literal strings, for instance, it may be better to not do the qr// but instead do 

    if (0 <= index($text, $pattern) && $text =~ /\b$pattern\b/) {
    }

[download]
(the latter bit just to preserve the \b checks).
--
Online Fortune Cookie Search

In reply to Re^2: Efficient regex matching with qr//; Can I do better? by ysth
in thread Efficient regex matching with qr//; Can I do better? by kruppy

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.