import subprocess
import time


commands = ['./time.sh'] * 5
outputs = [None] * len(commands)
processes = [None] * len(commands)


start = time.time()


for i, command in enumerate(commands):
    process = subprocess.Popen([command], stdout=subprocess.PIPE)
    processes[i] = process


for i, process in enumerate(processes):
    outputs[i] = process.communicate()
    print(i, outputs[i])


print('elapsed seconds: ', time.time() - start)