Same here--I spent a couple days porting a compiler frontend from Python 3->2 just to try out PyPy, and got rewarded with a 2-3x slowdown. I messed around with

Same here--I spent a couple days porting a compiler frontend from Python 3->2 just to try out PyPy, and got rewarded with a 2-3x slowdown. I messed around with some tracing parameters, but didn't get too much benefit IIRC. Of course, this was a couple years ago, and I don't have access to that codebase anymore. Things might've changed since then...