That's cool, but I am wondering where are the trials of say Cython or PyPy? Why is there a need to switch to a different language, where are the benchmarks or profiling to show where the performance issues lie? I like Go, and I plan to learn it myself, but I just don't get why people jump ship so quick from Python. This post makes it seem like Python is slow. I say it's not the language but the interpreter. GIL is nonexistant in Jython, or IronPython. It can be avoided with the multiprocessing module. Gevent may be good for regular python, but if you have the GIL getting in the way, best to switch to something else.