On Dec 19, 2003, at 2:10 AM, Jacob Swed wrote:

> The library version being used is 7.11.0-20031217. Compiled under OS X
> 10.2.8.
>
> We have not investigated the why, but have determined that if
> curl/libcurl is complied on OS X without the --disable-ipv6 option
> performance is severely and noticeably degraded. curl/libcurl takes an
> extremely long time resolving the host or host IP. Compiling with the
> --disable-ipv6 option alleviates the delays entirely. Incidentally,
> this occurs when run on vanilla installations of OS 10.1, 10.2 and
> 10.3.

Each one of those releases has had signifcantly different levels of
support of both IPv6 in general, and IPv6 hostname resolution in
specific. I don't think 10.1 shipped with any IPv6 support.

What does "without --disable-ipv6" mean? Was IPv6 autodetected? I would
not expect this on 10.1, for instance.

Can you provide a test case (perhaps a specific hostname you were using
and profiling information pointing at getaddrinfo if possible). If you
can, I can take a look at this in the new year and see if Apple has
existing problem reports relating to resolution speed and ask for
improvements for the next release.

Mac OS X should be hitting lookupd as a cache for all hostname
resolution, so I would not expect a significant amount of network delay
contributing to this issue after an initial lookup. Maybe that's not
working.

Shantonu

-------------------------------------------------------
This SF.net email is sponsored by: IBM Linux Tutorials.
Become an expert in LINUX or just sharpen your skills. Sign up for IBM's
Free Linux Tutorials. Learn everything from the bash shell to sys admin.
Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
Received on 2003-12-22