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A comment on Stop avoiding regular expressions damn it. Parent comment

Re:Stop avoiding regular expressions damn it by Titanous on Sunday May 12, 2013 @04:12PM (#5695651)
It's not "unoptimized", it has a different design[1] than other language implementations, resulting in different performance characteristics.

[1] http://swtch.com/~rsc/regexp/regexp1.html

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Re:Stop avoiding regular expressions damn it by kbenson on Monday May 13, 2013 @12:56AM (#5697257)
Not just a different design, a different set of features. For example, no backreferences.
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