Hi all, Here is the very first Python 2.7 interpreter to run existing multithreaded programs on multiple cores. Linux 32 bits. It is horribly slow right now, so consider this as nothing more than a demo :-) http://wyvern.cs.uni-duesseldorf.de/~arigo/pypy-c-r54960-stm.tar.bz2 Documentation: https://bitbucket.org/pypy/pypy/raw/stm-thread/pypy/doc/stm.rst A bientôt, Armin.