If you work at a sufficiently large company then optimisation work on sufficiently low level systems can save 7–8 figures per year, not that you’d likely see mu

If you work at a sufficiently large company then optimisation work on sufficiently low level systems can save 7–8 figures per year, not that you’d likely see much of those savings yourself. It often turns out that some tiny bit of code with not-great performance becomes embedded deeply in the stack and the small cost can add up over many machines.