Please see How do I post a question effectively? Once you have a discrete test case that you have run through Devel::NYTProf, and as well run test cases with Benchmark for versions both including and excluding study, we can help you understand your results.

You may also want to check out index, since you the regex engine is more power than you really need.

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

In reply to Re^3: counting the number of 16384 pattern matches in a large DNA sequence by kennethk
in thread counting the number of 16384 pattern matches in a large DNA sequence by anonym

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