Fix Python – Why shouldn’t I use PyPy over CPython if PyPy is 6.3 times faster?

I’ve been hearing a lot about the PyPy project. They claim it is 6.3 times faster than the CPython interpreter on their site.
Whenever we talk about dynamic languages like Python, speed is one of the top issues. To solve this, they say PyPy is 6.3 times faster.
The second issue is parallelism, the infamous Global Interpreter Lock (GIL). For this, ….