This is a worthless statement. Do you examine all of your generated machine code to ensure that it generates correct code? Any compiler that you cannot trust to inline 3 for strlen("foo") is not one you should trust to compile anything, let alone modern C++.
> Do you examine all of your generated machine code to ensure that it generates correct code?
(not OP). I examine the output if someone tells me it's slower, or if I care about performance. I did a very rough benchmark which says in this case they're equivalent [0], however that's not necessarily representative of the places it's called in. There's definitely a compile time overhead though [1]. On my current project there's ~20k files. On an 8 core machine (as an example), adding 150ms per file would add 7 minutes onto a clean build (before optimising the builds).