That won't work. When we say "constant-time code" what we really mean is "code whose running time is independent of its input". It won't really be constant due

That won't work. When we say "constant-time code" what we really mean is "code whose running time is independent of its input". It won't really be constant due to factors like the OS scheduler and the initial state of the CPU's instruction cache. What you really want is https://github.com/agl/ctgrind https://github.com/agl/ctgrind or something similar.