python 同步与异步性能区别

import gevent

def task(pid):
    """
    Some non-deterministic task
    """
    gevent.sleep(0.5)
    print('Task %s done' % pid)

def synchronous():
    for i in range(,):
        task(i)

def asynchronous():
    threads = [gevent.spawn(task, i) for i in range()]
    gevent.joinall(threads)

print('Synchronous:')
synchronous()

print('Asynchronous:')
asynchronous()

输出

Synchronous:
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Asynchronous:
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done
Task  done