The Lemire branch-predictor benchmark is K=1. Here is the K × M surface. (opens in new tab)

Daniel Lemire published a short note on 2026-03-18, *"How many branches can your CPU predict?"*, with three headline numbers from a one-loop benchmark: > The AMD Zen 5 processor can predict perfectly 30,000 branches. The Apple > M4 processor can predict perfectly 10,000 bran...