fib.c

int fib(n) {
  if(n <= 1)
    return 1;
  else
    return fib(n-1)+fib(n-2);
}

int main() {
  fib(30);
  return 0;
}
/*
~/tmp $ time ./fib 

real	0m0.042s
user	0m0.036s
sys	0m0.000s
*/

fib.pn

fib = (n):
  if (n <= 1): 1. else: fib (n - 1) + fib (n - 2)..
fib (30)

~/repos/why/potion (mine) $ time ./potion example/fib.pn 

real	0m0.180s
user	0m0.172s
sys	0m0.004s

fib.rb

def fib(n)
if n <= 1 then 1 else fib(n-1)+fib(n-2) end
end
fib(30)

=begin
~/tmp $ time ruby fib.rb

real	0m3.641s
user	0m3.248s
sys	0m0.348s

~/tmp $ time ruby1.9 fib.rb 

real	0m1.309s
user	0m1.028s
sys	0m0.020s

=end

gistfile4.txt