4 ms·

Because the cost() function OP posted isn't doing tail calls and can't be converted into tail call form.

• mcguire 8y ago
  Not with that kind of attitude. :-) Converting to continuation passing does result in tail calls.
  • mwkaufma 8y ago
    Is there an equivalent of call/cc in Python?
    • mcguire 8y ago
      No, you have to do it manually. I suppose you could write a code-transformer.