Comment by xscott

I don't understand why people care about the CPython GIL. For computationally intense stuff (numerics) running in the interpreter, the language is generally 60 times slower than PyPy and often 100 times slower than an equivalent C program. That means if you want performance, you would need to dodge Amdahl's law and have 60-100 processors for a hypothetical GIL-less CPython to match a single threaded program in PyPy or C.