Running the function v/s passing a callable. old.py from https://twitter.com/sunishsurendran/status/1301786397544570881

new.py

import concurrent
import time

def execute(count):
    start_time = time.time()

    with concurrent.futures.ProcessPoolExecutor() as executor:
        for _ in range(count):
            executor.submit(time.sleep, 1)

    elapsed_time = end_time - time.time()
    return {"concurrent_time": elapsed_time}

execute(4)
# {'concurrent_time': 1.0378141403198242}

old.py

import concurrent
import time

def ExecuteCode(count):

    start_time = time.time()

    with concurrent.futures.ProcessPoolExecutor() as executor:
        for _ in range(count):
            executor.submit(time.sleep(1))

    end_time = time.time()
    elspase_time = end_time-start_time
    return {"concurrent_time": elspase_time}

ExecuteCode(4)
# {'concurrent_time': 4.040162563323975}