> It is a Python in which you can do minor tweaks to your existing, non-multithreaded programs and get them to use multiple cores. You identify medium- or large-sized, likely-independent parts of the code and to ask PyPy-STM to run these parts in parallel. An example would be every iteration of some outermost loop over all items of a dictionary.

This is very neat! Obviously it's not a magic drop-in, but still.

Relevant bit from the docs: http://pypy.readthedocs.org/en/latest/stm.html#transaction-t...