You're right that many microbenchmarks can be noisy (and the environment you run them on can introduce more noise). But if you're attending cppcon, two enginee

You're right that many microbenchmarks can be noisy (and the environment you run them on can introduce more noise). But if you're attending cppcon, two engineers in Google's production toolchain organization are giving a talk on "Releasing C++ Toolchains Weekly in a 'Live at Head' World" where they'll discuss (among other things) how we use various microbenchmarks to catch performance regressions. https://sched.co/Sft4 https://sched.co/Sft4