https://github.com/shuque/time-gai-connect

https://github.com/shuque/time-gai-connect

connection establishment tcp time

Last synced: over 1 year ago
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• Host: GitHub
• URL: https://github.com/shuque/time-gai-connect
• Owner: shuque
• Created: 2013-07-10T23:56:53.000Z (about 13 years ago)
• Default Branch: master
• Last Pushed: 2016-03-19T20:28:37.000Z (over 10 years ago)
• Last Synced: 2025-01-23T14:53:34.955Z (over 1 year ago)
• Topics: connection, establishment, tcp, time
• Language: Python
• Homepage:
• Size: 1.95 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

          
time-gai-connect.py

   A very short python program that measures TCP connection establishment

   times to a given hostname, using addresses returned by getaddrinfo().

   Arguments are a hostname, and optionally a port number, otherwise port

   80 is assumed.

   I wrote this program to help me measure real connection establishment

   times to dual stack (IPv4 and IPv6) destinations, to see how this

   affects address selection algorithms in operating systems and

   applications. Some modern algorithms (eg. Happy Eyeballs, Apple network

   stats based connection preferences) take these connection times into

   account when choosing destination addresses.

   Usage:

    time-gai-connect.py hostname

    time-gai-connect.py hostname portnumber

An example run (from a machine on the upenn campus) with the main

IETF webserver, www.ietf.org:

     $ time-gai-connect.py www.ietf.org

     2001:1890:123a::1:1e                     90.98601 ms

     12.22.58.30                              76.32303 ms

   Shumon Huque

   E-mail: shuque -at- upenn.edu

   Web: http://www.huque.com/~shuque/

   University of Pennsylvania.

   Copyright (c) 2011-2012 Shumon Huque. All rights reserved. This program 

   is free software; you can redistribute it and/or modify it under the same

   terms as Python itself.