2012/10/30 Guido van Rossum <guido@python.org>

Here's another unscientific benchmark: I wrote a stupid "http" server (stupider than echosvr.py actually) that accepts HTTP requests and responds with the shortest possible "200 Ok" response. This should provide an adequate benchmark of how fast the event loop, scheduler, and transport are at accepting and closing connections (and reading and writing small amounts). On my linux box at work, over localhost, it seems I can handle 10K requests (sent using 'ab' over localhost) in 1.6 seconds. Is that good or bad? The box has insane amounts of memory and 12 cores (?) and rates at around 115K pystones.

Take a look at http://nichol.as/benchmark-of-python-web-servers It is a bit outdated but can be useful to get some insight. -- Carlo Pires

On 30/10/2012 8:24pm, Guido van Rossum wrote:

Here's another unscientific benchmark: I wrote a stupid "http" server (stupider than echosvr.py actually) that accepts HTTP requests and responds with the shortest possible "200 Ok" response. This should provide an adequate benchmark of how fast the event loop, scheduler, and transport are at accepting and closing connections (and reading and writing small amounts). On my linux box at work, over localhost, it seems I can handle 10K requests (sent using 'ab' over localhost) in 1.6 seconds. Is that good or bad? The box has insane amounts of memory and 12 cores (?) and rates at around 115K pystones.

I tried the simple single threaded benchmark below on my laptop. | Connections/sec ---------------------------------------+----------------- Linux | 6000-11000 Linux in a VM (with 1 cpu assigned) | 4600 Windows | 1400 On Windows this sometimes failed with: OSError: [WinError 10055] An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full import socket, time, sys, argparse N = 10000 def server(): l = socket.socket() l.bind(('127.0.0.1', 0)) l.listen(100) print('listening on port', l.getsockname()[1]) while True: a, _ = l.accept() data = a.recv(20) a.sendall(data.upper()) a.close() def client(port): start = time.time() for i in range(N): with socket.socket() as c: c.connect(('127.0.0.1', port)) c.sendall(b'foo') res = c.recv(20) assert res == b'FOO' c.close() elapsed = time.time() - start print("elapsed=%s, connections/sec=%s" % (elapsed, N/elapsed)) parser = argparse.ArgumentParser() parser.add_argument('--port', type=int, default=None, help='port to connect to') args = parser.parse_args() if args.port is not None: client(args.port) else: server() -- Richard