There's another way to make code run efficiently ...
... give all the developers old, slow PC's for writing software on. The trouble with developers is that they all seem to run computers that are state-of-the-art and screaming fast, nothing like the laptops a lot of their customers are running. In the real world, Windows PC's are 3 years old, underpowered, patched and patched and overpatched, running anti-virus live scanning that takes up to 85% CPU under 'normal' circumstances, and since we have to get real work done, on top of all that we have to run a word processor, a spreadsheet, email software, and on and on. It's no wonder that code that looks so nice on a developer's shiny new workstation, running all by itself, ends up dogging my system. I spend quite a bit of time just watching stuff crawl along in Task Manager, as the CPU stays pegged at 99% utilization. All 4 cores, at that.
Biting the hand that feeds IT
