pocketlang/tests/benchmarks/fib/fib.rb

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

start = Time.now
for i in 0...10
  puts fib(30)
end
puts "elapsed: " + (Time.now - start).to_s + ' s'