I do not think that it is that useful. While i have seen people greatly overestimate computing complexity of simple tasks like comparing numbers, i do not believe knowing how long such instructions take gives you much more. Especially interpreted JIT compiled code is not exactly predictable in performance and optimizing single instructions not very useful. However it is a fun game and does indeed give a better rough assessment for performance in various implementations. But if you really like to optimize your code these are just some hints. You will have to run benchmarks for every use case.