* Running with just normal Lua

  $ time lua fibonacci.lua
  The 40th Fibonacci number is: 102334155
  
  real    0m5.601s
  user    0m5.590s
  sys     0m0.001s

* Running with Luajit

  $ luajit -b fibonacci.lua fibonacci.luac
  $ time luajit fibonacci.luac
  The 40th Fibonacci number is: 102334155
  
  real    0m1.050s
  user    0m1.047s
  sys     0m0.001s

* Running with Luajit embedded into C

  $ cc -o fibonacci fibonacci.c `pkg-config --cflags --libs luajit`
  $ time ./fibonacci
  The 40th Fibonacci number is: 102334155
  
  real    0m1.033s
  user    0m1.031s
  sys     0m0.000s