On Tue, 29 Jun 2010, Pieter Ennes wrote:

> What would be the effect of using c-ares w.r.t. resolve performance when
> considering the resolves for a typical webpage load (incl. embedded assets)?

I don't know. But it should be easy enough for you to measure this!

> Does c-ares by-pass the OS entirely?

Yes. c-ares does its own name resolving and uses no OS functions made for that
purpose.

> And finally, does curl do normal gethostbynames when c-ares is disabled?

Yes: http://curl.haxx.se/docs/faq.html#How_does_libcurl_resolve_host_na

-- 
  / daniel.haxx.se
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