How we made our DNS stack 3x faster

What this post added

Replaced the data pipeline and the authoritative DNS server (rrDNS) to achieve a 3x speed improvement. Optimized the data model to group RRSets and use MessagePack for serialization, reducing storage space by 9x. Re-architected the authoritative filter (rrDNS v2) for better performance and scale, resulting in zero delays in the new pipeline and faster DNS query responses.