2026-03-236 min readTwo years ago, Cloudflare deployed our 12th Generation server fleet, based on AMD EPYC™ Genoa-X processors with their massive 3D V-Cache. That cache-heavy architecture was a perfect match for our request handling layer, FL1 at the time. But as we evaluated next-generation hardware, we faced a dilemma — the CPUs offering the biggest throughput gains came with a significant cache reduction. Our legacy software stack wasn't optimized for this, and the potential throughput benefi...