We have recently integrated libcurl into our application to provide the
underlying HTTP transport (replacing WinINET, which is a huge improvement,
thanks!). The application is using the multi interface, though for the most
part on a single request is made at a given time.

I'm seeing strange behavior where requests are _much_ faster when routed
through a proxy (in this case the Fiddler diagnostic tool). Note that this
is
not a caching proxy, and all the requests are POSTs anyway, so I don't
think
that is the explanation. If I run the app with an HTTP_PROXY environment
variable defined it is much faster than without - the code is the same in
both
cases. I've instrumented the code as well to display the progression of
requests, and it appears to be the same in both cases except the proxied
requests return much faster.

I'd love to have the same performance regardless of whether or not a proxy
is
used, so is there something I'm potentially missing that might speed up the
non- proxied case as well?

thanks

matt

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Received on 2013-03-13