How can I perform performance testing on Python extensions?

How can I perform performance testing on Python extensions?

You can use tools like timeit, cProfile, or third-party libraries like pytest-benchmark to measure performance.

Can you give me an example of using timeit?

Sure! You can use timeit like this:

import timeit

def my_function():
    # Your code here
    pass

execution_time = timeit.timeit(my_function, number=1000)
print(f'Execution time: {execution_time}')

What about using cProfile?

With cProfile, you can run your script and get a detailed report:

python -m cProfile my_script.py

Are there any best practices for performance testing?

Yes! Always test in a controlled environment, avoid using print statements in performance tests, and run multiple iterations to get accurate results.