There are also some metrics comparing the performance of a couple RE engines to LPEG in the LPEG paper (http://www.inf.puc-rio.br/~roberto/docs/peg.pdf http://w

There are also some metrics comparing the performance of a couple RE engines to LPEG in the LPEG paper (http://www.inf.puc-rio.br/~roberto/docs/peg.pdf http://www.inf.puc-rio.br/~roberto/docs/peg.pdf). Spoiler alert: LPEG is usually faster.