Can tell you performance has never been an issue for me and python. Usually when I see the claim come up it is usually a poor test (ie "let's see how fast we ca

Can tell you performance has never been an issue for me and python. Usually when I see the claim come up it is usually a poor test (ie "let's see how fast we can read from a database") or not knowing the performance options available to python. You can use pypy for JIT compilation performance. You can use eventlet to add co-operative threading / evented processing. Use multiprocessing if you want to use more than one core. The point of python is to optimize for human understanding 1st, and if your abstractions are good then you can enable extra performance with other libraries.