Optimizing a Spin-Lock -- David Álvarez Rosa

From a naive exchange loop to a spin-lock 5.7x faster drawing 5.4x less energy, with benchmarks, assembly, and perf counters at each step. Optimizing a Spin-Lock by David Álvarez Rosa From the article: A spin-lock is a lock that never sleeps. Instead of yielding to the scheduler, the thread stays on the CPU and spins .