Python Forum

Hello,

I'm trying to create a socket, then connect to the same server until I can't make any connection from my PC and I face a problem : my program is WAY faster with Python 2.7 than with Python 3.7.

Here a minimal example:

# client.py import time import socket begin = time.time() socket_list = [] while True: try: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(1) s.connect(("127.0.0.1", 65432)) socket_list.append(s) except: print(len(socket_list)) print(time.time() - begin) for sock in socket_list: sock.close() break

# server.py import socket s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.bind(("127.0.0.1", 65432)) s.listen() while True: s.accept()

Ouput with Python 3.7 client side and Python 3.7 server side:

16298
32.764869928359985

Ouput with Python 2.7 client side and Python 3.7 server side:

16297
1.86599993706

OS: Windows 10

Removing the line

s.settimeout(1)

solved the problem, I now have similar performance with Python 2.7 and Python 3.7. Why, I don't know.