I believe it is to avoid drawing more power than the adapter can deliver
(with the battery in, much like a Prius, the battery can help to cover
spikes in load).

On Mon, Oct 27, 2008 at 7:03 AM, Francois Pepin <fpepin@cs.mcgill.ca> wrote:

>
>  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
>
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>



-- 
Byron Ellis (byron.ellis@gmail.com)
"Oook" -- The Librarian

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