python - Can I improve my server response time? -

i have following sample code running on server. accepts connections, when reads responds immediately:

import socket import select  def main(): bind = ("0.0.0.0", 28889) server_socket = socket.socket(socket.af_inet, socket.sock_stream) server_socket.setsockopt(socket.sol_socket, socket.so_reuseaddr, 1) server_socket.bind(bind) server_socket.listen(50) server_socket.setblocking(0) server_socket.setsockopt(socket.ipproto_tcp, socket.tcp_nodelay, 1)  clients = {}  epoll = select.epoll()  # @undefinedvariable epoll.register(server_socket.fileno(), select.epollin)  # @undefinedvariable  while 1:     events = epoll.poll(1)     (fileno, event) in events:         if fileno == server_socket.fileno():             sock, addr = server_socket.accept()             sock.setblocking(0)             sock.setsockopt(socket.ipproto_tcp, socket.tcp_nodelay, 1)             fileno = sock.fileno()             epoll.register(fileno, select.epollin)  # @undefinedvariable             clients[fileno] = sock          elif event & select.epollin:  # @undefinedvariable             sock = clients[fileno]             try:                 sock.recv(4096)                 sock.send("~\n")             except socket.error:                 sock.close()                 del clients[fileno]          elif event & select.epollhup:  # @undefinedvariable             sock = clients[fileno]             sock.close()             del clients[fileno]  if __name__ == "__main__": main() 

i have following client code connects server , times response time 10x:

import socket import time  def main(): sock = socket.socket() sock.connect(("192.30.35.15", 28889))  _ in xrange(10):     start_time = time.time()     sock.send("~\n")     sock.recv(2048)     end_time = time.time()     print "ping: %.5f" % (end_time-start_time)   if __name__ == "__main__": main() 

here results running it:

ping: 0.09100 ping: 0.11500 ping: 0.87100 ping: 0.24400 ping: 0.49100 ping: 1.45300 ping: 0.74800 ping: 1.59100 ping: 0.43600 ping: 0.27100 

this seems pretty bad pings jumping 1.5 seconds.

here's when ping server:

reply 192.30.35.15: bytes=32 time=83ms 

why response time bad , there can improve it?

note: cheap rented server, best can expect? don't know server administration, there should check?

remember, tcp requires 3-way handshake, plus you're sending 10 round trips of data. you've created worst case in terms of latency / byte.

check out icmp ping times .. multiply like.. 25. think you'll see application ping times in line should expect.

edit: while sound advice many programs, guess doesn't pertain situation. connect isn't within timers. still, you're looking @ delays due nagle algorithm, potentially turn off specific code (but in general it's leave on). still want @ icmp ping times see response time possibly given network situation.