These are "embarassingly parallel" examples that multiprocessing is ok for, though. There was always the small caveat that you can't pickle a file handle, but i

These are "embarassingly parallel" examples that multiprocessing is ok for, though. There was always the small caveat that you can't pickle a file handle, but it wasn't a real problem. Threads are more useful if you have lots of shared state and mutexes. I think these examples would also perform well with GIL'd threads, since the actual Python part is just waiting on blocking calls that do the expensive work. But maybe not.