A simple example for demonstrating a free-threaded speedup

example-ft.py

import time
from concurrent.futures import ThreadPoolExecutor
from random import Random


def worker(base, random):
    acc = base * 2
    for i in range(1000):
        acc += i * (42 + random.randint(0, 100))
    return acc


def main():
    with ThreadPoolExecutor() as executor:
        for i in range(1000):
            # Give each worker its own `Random` generator to avoid cross-thread contention
            executor.submit(worker, i, Random())


if __name__ == "__main__":
    t0 = time.time()
    main()
    t1 = time.time()
    print(f"Elapsed time: {t1 - t0:.2f} seconds")