alt Hacker News"One such implementation that broke is the getaddrinfo function in glibc, which is commonly used on Linux for DNS resolution. When looking at its getanswer_r implementation, we can indeed see it expects to find the CNAME records before any answers:"
Wherever possible I compile with gethostbyname instead of getaddrinfo. I use musl instead of glibc
Nothing against IPv6 but I do not use it on the computers and networks I control
Your code runs slower on mobile devices, since (as a rule of thumb) mobile networks are ipv6-only and ipv4 traffic has to pass through a few layers of tunneling.