Asyncio vs. sync approach

async.py

from concurrent import futures
import time

def long_running_task(result):
    print('Task is running!')
    time.sleep(1)
    return result

start = time.perf_counter()

with futures.ThreadPoolExecutor(12) as executor:
    results = executor.map(long_running_task, range(5))
print(list(results))

end = time.perf_counter()
print('Total time: {t:.2f} s'.format(t=end - start))

sync.py

import time

def long_running_task():
    print('Task is running!')
    time.sleep(1)

start = time.perf_counter()
for i in range(5):
    long_running_task()

end = time.perf_counter()
print('Total time: {t:.2f} s'.format(t=end - start))