DFA vs NFA. I thought it was humorous that the most important features of modern regex engines are the things that prevent them from meeting the criteria of th

DFA vs NFA. I thought it was humorous that the most important features of modern regex engines are the things that prevent them from meeting the criteria of the original definition for a regex engine. And of course, with a true DFA regex engine, you'll never suffer from catastrophic backtracking or exponential performance degradation with a bad regex or bad subject string.