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

Guido van Rossum guido at python.org
Wed Aug 12 17:07:32 CEST 2009

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. You might see a pattern. Is this on Windows? It's embarrassing, we've had problems with socket speed on Windows since 1999 and they're still not gone... :-(

On Wed, Aug 12, 2009 at 4:05 AM, Chris Withers<chris at simplistix.co.uk> wrote:

Hi All,

I'd like to work on this issue: http://bugs.python.org/issue2576 Specifically, in my case, while IE can download a 150Mb file from a local server in about 3 seconds, httplib takes over 20 minutes! However, I'm kinda stumped on where to start with debugging the difference. I've tried upping the buffer size as suggested in the issue, but it's had no effect... Any ideas? Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk

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

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