Article in this case, hence the new paragraph. I used to routinely do for Java... with -XX:+PrintAssembly to ensure certain bound checks were eliminated by enfo

Article in this case, hence the new paragraph. I used to routinely do for Java... with -XX:+PrintAssembly to ensure certain bound checks were eliminated by enforcing the index fell within the lattice [0-array.length). A simple test that always succeeded improved zip compression by 15% for instance. Not going in details but verifying results of microbenchmarks with assembly is quite useful - of course usually limited to very hot spots. Of course about owning the hardware and doing on bare metal with fixed freq (core/uncore) + set voltage(s). Removing as many variables as possible is important just as knowing what to test and how it gets affected by the hardware.