[chopin]

I agree as it is important to know your boundaries. But I also like the GP prefer legible over performant code whenever it is obvious that I am not going to need more performance. In almost all cases I encountered the necessity to optimize code the reason was I/O bound. I don't recall any instance of algorithmic performance being a problem.

[tathougies]

Tco has little to do with timing performance and all to do with keeping code legible in functional languages.

[dnautics]

In FP that implements actor model, for example, you will be in a world of hurt if you don't TCO your actor - has nothing at all to do with legibility.