Comment 51 for bug 94940

The problem *does* occur with non-broken DNS servers, too. I just tried the test program "test3.c" attached to my comment from 2007-05-13 on a system booted from a Lucid alpha3 live CD, and it still takes more than five seconds to execute. The system was directly querying a BIND 9 DNS server, and there was no "cheap home router" involved. This is trivial to reproduce; please try it.

Why is Ubuntu doing mDNS lookups for reverse mappings, anyway? I can see the utility of doing mDNS for forward mappings, but doing mDNS for reverse mappings seems not only harmful (being the cause of this bug), but also quite pointless.