[Web-SIG] Fwd: Fwd: wsgiref.simple_server slow on slow network
tibor at infinit.sk
Mon Jul 21 19:58:41 CEST 2008
I tried this but no difference :-(. I made sure I changed the right source code.
On Mon, Jul 21, 2008 at 6:28 PM, Robert Brewer <fumanchu at aminus.org> wrote:
> Tibor Arpas wrote:
>> I'm quite new to python and I ran into a performance problem with
>> wsgiref.simple_server. I'm running this little program.
>> from wsgiref import simple_server
>> def app(environ, start_response):
>> start_response('200 OK', [('content-type', 'text/html')])
>> return ['*'*50000]
>> httpd = simple_server.make_server('',8080,app)
>> except KeyboardInterrupt:
>> I get many hundreds of responses/second on my local computer, which is
>> But when I access this server through our VPN it performs very bad.
>> I get 0.33 requests/second as compared to 7 responses/second when
>> accessing 50kB static file served by IIS.
>> I also tried the same little program using paste.httpserver and that
>> version works fast as expected.
>> I cannot really understand this behavior. My only thought is that the
>> wsgiref version is sending the data in many chunks, and therefore the
>> latency of the VPN comes into play. But I don't really know how to
>> test this.
> One possible answer is that wsgiref doesn't disable the Nagle algorithm
> Try changing WSGIServer.server_bind to read:
> def server_bind(self):
> """Override server_bind to store the server name."""
> import socket
> self.socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY,
> Robert Brewer
> fumanchu at aminus.org
>  http://en.wikipedia.org/wiki/Nagle's_algorithm
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