wren/benchmark/fib.wren

var fib = fn(n) {
  if (n < 2) {
    return n
  }

  return fib.call(n - 1) + fib.call(n - 2)
}

var start = OS.clock
var i = 0
while (i < 5) {
  IO.write(fib.call(28))
  i = i + 1
}
IO.write("elapsed: " + (OS.clock - start).toString)