[issue29533] urllib2 works slowly with proxy on windows

[Marc Schlaich]

Marc Schlaich added the comment:

Julia, could you please add other major browsers/HTTP clients (Firefox, Chrome, curl, ...) to your comparison (compare_ie_urllib.txt). I would expect that Python/urllib is the only implementation doing DNS requests for proxy bypass handling.

Please note that curl uses the `no_proxy` environment variable, so the syntax is slightly different.

For anyone who doesn't fully grasp the details of this issue, there might be a better explanation at https://github.com/kennethreitz/requests/issues/2988.

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<http://bugs.python.org/issue29533>
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