Cloudflare has halved DNS build delays and reduced memory usage by 85% by introducing a targeted build planner that only rebuilds what changed, rather than full-zone rebuilds for zone setting updates. The new scheduler also combines work for the same zone, enabling shorter wait times across the pipeline while maintaining correctness.
Background
Cloudflare's Zone Builder is a critical component of their authoritative DNS infrastructure, processing hundreds of DNS record changes and zone events per second. As zone sizes have grown to tens of millions of records, the cost of full rebuilds has become a bottleneck.
- Source
- hackernews
- Published
- Nov 2, 2026 at 10:47 PM
- Score
- 7.0 / 10