Comment by kazinator

Why would I want this to be 17, if I'm representing strings as array of code points, rather than UTF-8?

TXR Lisp:

  1> (len " ")
  5
  2> (coded-length " ")
  17

(Trust me when I say that the emoji was there when I edited the comment.)

The second value takes work; we have to go through the code points and add up their UTF-8 lengths. The coded length is not cached.