If you spent much time looking at regexs you might enjoy this set of articles about improving regex engine performance: https://swtch.com/~rsc/regexp/regexp1.h

If you spent much time looking at regexs you might enjoy this set of articles about improving regex engine performance: https://swtch.com/~rsc/regexp/regexp1.html https://swtch.com/~rsc/regexp/regexp1.html