If you run BIND, you may wonder what kinds of improvements you'll see when upgrading from one version to another. Occasionally we like to publish benchmark test results to help with those decisions.

We've just posted a blog on BIND 9.20 resolver performance compared to 9.18. tl;dr: under mid- to heavy traffic loads, 9.20 has even lower latency than 9.18, particularly while starting up.

Read more about our performance benchmarking at https://www.isc.org/blogs/2026-03-05-bind-resolver-performance/

Thanks for using ISC's software!