Single threaded single process Python 3 is faster than Python 2 on I/O intensive workloads if you use asyncio effectively. You need to consider Cython, Celery,

Single threaded single process Python 3 is faster than Python 2 on I/O intensive workloads if you use asyncio effectively. You need to consider Cython, Celery, and C-extensions such as numpy for performance critical code.