Performance

• Go disassembly: branches on arm64 vs amd64 2025-11-16

  A tiny branch in Go then disassembled on arm64 and amd64. We'll look at the key instructions and micro-benchmark the cost.

• RSA vs ECDSA in CoreDNS DNSSEC plugin: The CPU Cost of Signing NXDOMAINs 2025-10-29

  On-the-fly DNSSEC signing of negative responses is dramatically cheaper with ECDSA than RSA in CoreDNS. This benchmark showcases how RSA burns 30x the amount of CPU time compared to ECDSA for the same load, confirming CoreDNS's guidance to prefer ECDSA.