Chandler Carruth: Tuning C++ with Benchmarks and CPUs

HN recommends it as an eye-opening primer on benchmarking and performance analysis, especially for people who have not benchmarked on Linux.

Chandler Carruth walks through tuning C++ performance, from writing benchmarks to analyzing results on real CPUs and compilers. It focuses on small-scale problems such as loop kernels, data structures and algorithms, and on keeping compilers from optimizing benchmarks away.