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

Simon Urbanek simon.urbanek at r-project.org
Sun Oct 26 14:50:06 CET 2008


On Oct 26, 2008, at 5:21 AM, Nils Rüfenacht wrote:

> Thanks for all your replies.
>
> I now know what made the difference (but still can't believe it!!!).  
> Before I was running with the mains adapter only whereas the battery  
> was removed. If the battery is inserted and the adapter is connected  
> the runtime decreases "dramatically" even on my MacBook.
>
> Battery INSERTED:
> indexGenerator(0.08,0.15,30,100): 10.242
> indexGenerator(0.08,0.15,30,1000): 100.875
>
> Battery REMOVED:
> indexGenerator(0.08,0.15,30,100): 19.779
> indexGenerator(0.08,0.15,30,1000): 197.375
>
> Would anyone have expected that? Sorry, but me I wouldn't.
>

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.

Cheers,
Simon


>
>
> Am 26.10.2008 um 07:54 schrieb Ken Beath:
>
>> On 26/10/2008, at 4:23 AM, Nils Rüfenacht wrote:
>>
>>> Thanks for your replies.
>>>
>>> There's nothing special about my code (I guess), but here it is.
>>>
>>
>> I have a 1 year old iMac 2 Ghz. The   
>> indexGenerator(0.08,0.15,30,1000) call takes about 121s in . For  
>> comparison I ran the Windows version under Parallels and it also  
>> takes about 120s.
>>
>> I think you have a sick MacBook, look for a benchmarking program  
>> (maybe geekBench) and compare against others, or contact your Apple  
>> dealer and see what they suggest.
>>
>> Ken
>
>
>



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