simple_client.py

from tornado.util import b
import socket
import sys

MB   = 0x100000
dlen = 5 * MB
data = b("A") * dlen + "\r\n"
port = 16661

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
s.connect((sys.argv[1, port))
print s.recv(1024)
s.send(data)
print s.recv(1024)

# sample runner:
# for x in `seq 100`; do python2.7 simple_client.py & done; time wait