[Python-Dev] how to debug httplib slowness (original) (raw)

Guido van Rossum guido at python.org
Wed Aug 12 18:10:57 CEST 2009

On Wed, Aug 12, 2009 at 8:34 AM, Chris Withers<chris at simplistix.co.uk> wrote:

Guido van Rossum wrote:

Try instrumenting the actual calls to the lowest-level socket methods (recv() and send()) and log for each one the arguments, return time, and how long it took. Can I do that in python code?

Probably if you hack on the socket.py file long enough.

You might see a pattern. Is this on Windows? Well, yes, but I'm not 100%. The problematic machine is a Windows box, but there are no non-windows boxes on that network and vpn'ing from one of my non-windows boxes slows things down enough that I'm not confident what I'd be seeing was indicative of the same problem...

Time to set up a more conclusive test. Do you have something like curl or wget available on the same box?

It's embarrassing, we've had problems with socket speed on Windows since 1999 and they're still not gone... :-( Oh dear :-(

Well it may be that it's really just your box. Or proxy settings. Look into proxy settings.

-- --Guido van Rossum (home page: http://www.python.org/~guido/)

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