On: The Functional Style (2018)

[zug_zug]

I think I know what you mean. I wouldn't use the word zealot as much as astronaut.

FP Astronaut -- Super focused on hypothetical, academic, mathematical concerns and random performance optimizations (e.g. tail recursion) over clarity. I think scala's Slick library is an example of this.

FP Pragmatist -- Concerned about clarity, debugging, logging, correctness, readability by all skill levels, modifiability, documentation, the common cases first and the extreme cases last

I think you can be a big FP advocate without being an off-putting incomprehensible blowhard

[julesnp → zug_zug]

I've never heard of tail recursion being used as a performance optimization. Generally it's required to prevent a recursive function from blowing the stack.

Iteration is usually more performant than recursion, but doesn't mix well with immutability.

[Technetium_Hat → julesnp]

Tail calls _are_ iteration, just expressed as a function.