[saagarjha]

Unfortunately modern processors do not work how most people think they do. Optimizing for less work for a nebulous idea of what "work" is generally loses to bad memory access patterns or just using better instructions that seem most expensive if you look at them superficially.

[astrange]

If you're important enough they'll design the next processor to run your code better anyway.

(Or at least add new features specifically for you to adopt.)