pocketlang/test/benchmark/fib/fib.pk

from os import clock

def fib(n)
  if n < 2 do return 1 end
  return fib(n - 1) + fib(n - 2)
end

start = clock()
for i in 0..10
  print(fib(28))
end

print('elapsed:', clock() - start, 's')