does python have jit

Does Python Have JIT?

Yes, Python does have JIT (Just-in-Time) compilation. However, this feature is relatively new and is only available in certain Python implementations.

What is JIT?

JIT or Just-in-Time compilation is a technique used by programming languages to improve their performance. In JIT, the code is compiled at runtime rather than beforehand. This means that the code is compiled only when it is needed, making it more efficient.

Which Python Implementations have JIT?

The two most popular implementations of Python, CPython, and PyPy, have different approaches when it comes to JIT.

  • CPython: This is the standard implementation of Python and does not have built-in support for JIT. However, there are external libraries like PyPy that can be used to add JIT support.
  • PyPy: This implementation of Python has built-in support for JIT. PyPy's JIT compiler is called the RPython (Restricted Python) compiler. It compiles the code on-the-fly as the program runs, making it faster than CPython in many cases.

How to use JIT in PyPy?

Using JIT in PyPy is very easy. All you need to do is install PyPy and run your Python code using the "pypy" command instead of "python". PyPy will automatically use its JIT compiler to optimize your code.

# Example code using JIT in PyPy

def fibonacci(n):
    if n <= 1:
        return n
        return fibonacci(n-1) + fibonacci(n-2)

fibonacci(35) # Runs faster with PyPy's JIT compiler