pocketlang/test/benchmark/fib/fib.pk

from lang import clock

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

start = clock()
for i in 0..10
  print(fib(30))
end
print('elapsed:', clock() - start, 's')