[R-SIG-Mac] Old Dell running faster than new MacBook

[Francois Pepin]

> Yes, if your energy settings are to save battery as I said in the  
> original reply. You can choose which mode you want to use (from  
> battery saving to best performance - and you can even create a custom  
> mode), so it's up to you whether you want battery life or fast  
> benchmarks ;). Note that the settings are customizable for both batter  
> and adapter power.

Actually, it's the difference between:

Laptop plugged in, battery in:
 >indexGenerator(0.08,0.15,30,100)
    user  system elapsed
  12.051   0.193  13.365

Laptop plugged in, battery out:
 >indexGenerator(0.08,0.15,30,100)
    user  system elapsed
  25.507   0.503  27.368

This is with a 2.16GHz MacBook Pro.

So it should fall under the "Power adapter" energy saving in both cases. 
  Does anyone know why it should run slower without the battery?

Francois