no-gil test

README.md

No GIL

REF: https://github.com/colesbury/nogil

run test env

# run and remove container
docker run --rm $(docker build -q .)

test result

enable gil took about more than 3 times performance time.

no-gil

nogil=True
fibo: 9227465 elapsed time 16.095300436019897.
fibo: 9227465 elapsed time 16.52220582962036.
fibo: 9227465 elapsed time 16.68897533416748.
fibo: 9227465 elapsed time 16.693021774291992.
fibo: 9227465 elapsed time 16.901812314987183.
fibo: 9227465 elapsed time 16.987688779830933.
fibo: 9227465 elapsed time 20.314191818237305.
fibo: 9227465 elapsed time 20.323174953460693.

gil

nogil=False
fibo: 9227465 elapsed time 66.92367959022522.
fibo: 9227465 elapsed time 70.01325607299805.
fibo: 9227465 elapsed time 70.25191235542297.
fibo: 9227465 elapsed time 71.103266954422.
fibo: 9227465 elapsed time 71.86525321006775.
fibo: 9227465 elapsed time 71.93268299102783.
fibo: 9227465 elapsed time 72.1888496875763.
fibo: 9227465 elapsed time 72.25596213340759.

Dockerfile

FROM nogil/python

WORKDIR /

# If enable gil uncomment below:
# ENV PYTHONGIL=1

COPY ./main.py /main.py

CMD ["python", "/main.py"]

main.py

import sys
from concurrent.futures import ThreadPoolExecutor

print(f"nogil={getattr(sys.flags, 'nogil', False)}")

def fib(num):
    """fibonacci"""
    if num < 2:
        return 1

    return fib(num-1) + fib(num-2)

if __name__ == "__main__":
    THREADS = 8

    if len(sys.argv) > 1:
        THREADS = int(sys.argv[1])

    with ThreadPoolExecutor(max_workers=THREADS) as executor:
        for _ in range(THREADS):
            executor.submit(lambda: print(f"fibo: {fib(34)}"))