thanks, mago is a cool project. probably not as a dep tho, the parser isnt where the time goes (the 55x gap is all in evaluation, thats what the bytecode vm is for) and our parser is deliberatly tuned to match php's exact parse error messages, which is itself worth tests in the corpus. but using it as a second oracle to cross check my parser against theirs is actually a neat idea, same trick as the phpt suite but at the syntax layer.