It might also be much faster to join all those regexes together to a single regex and match it once, instead of iterating over the regexes (Don't know if that works in your case).
And it also may be a lot slower. Combining the patterns may cause the optimizer to give up much earlier (or not kick in at all). OTOH, the code as given would benefit from a combined pattern in the sense than no recompilation is needed at all (but there are other ways to achieve that). OP should do some benchmarking to see whether combining the patterns is an improvement or not. (If OP needs to know which "branch" of an alternation matched, the OP could make use of the (*:NAME) construct - provided the OP uses 5.10 or later).

In reply to Re^2: An efficient way to parallelize loops by JavaFan
in thread An efficient way to parallelize loops by Deus Ex

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.