keepalive.py 文件源码

def comp(N, url):
    print '  making %i connections to:\n  %s' % (N, url)

    sys.stdout.write('  first using the normal urllib handlers')
    # first use normal opener
    opener = urllib2.build_opener()
    urllib2.install_opener(opener)
    t1 = fetch(N, url)
    print '  TIME: %.3f s' % t1

    sys.stdout.write('  now using the keepalive handler       ')
    # now install the keepalive handler and try again
    opener = urllib2.build_opener(HTTPHandler())
    urllib2.install_opener(opener)
    t2 = fetch(N, url)
    print '  TIME: %.3f s' % t2
    print '  improvement factor: %.2f' % (t1/t2, )