PyGTA this month is going to try a code-dojo with the goal of speeding up some Python package up using a Cython extension module. We'll decide which module to speed up at the meeting, but if you have suggestions, would like to hear them. Should be a (pure) Python module which could benefit from C/Cython extension for performance. I'm thinking maybe an A* pathfinding algorithm, Pydispatcher's core observer mechanism, or something similarly easy-to-understand for (potentially new) Pythoneers.