Answers for "measure performance in python time"

python measure time

import time

start = time.time()
print("hello")
end = time.time()
print(end - start)

python system performance

import os
import psutil
pid = os.getpid()
py = psutil.Process(pid)
memoryUse = py.memory_info()[0]/2.**30  # memory use in GB...I think
print('memory use:', memoryUse)