For some reason, masklinn's comment is dead. Posting it here: <quote> > Python uses native multi-threads, but the GIL restriction means only one thread can ru

For some reason, masklinn's comment is dead. Posting it here: <quote> > Python uses native multi-threads, but the GIL restriction means only one thread can run >> Can run Python code, if you're multithreading for e.g. IO the IO code will generally release the GIL. </quote> Yes, native code can release the GIL and run in parallel. As far as it's pure python, only one thread runs at a time. The options are multiprocessing, gevent style concurrency(which I prefer to node's) and native extensions. It isn't as bleak as people make it out to be.