This is cool, but trying to reason about compilers may not an individual developer as far as simply profiling changes to the sections of code the program will

This is cool, but trying to reason about compilers may not an individual developer as far as simply profiling changes to the sections of code the program will spend the most time in. Don't guess, profile. Don't talk about something being faster until you load it with production (or production like) data and run it a few times.