On Thu, Dec 12, 2013 at 5:16 PM, Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com> wrote:
 
That's completely germane, but he didn't say 100% faster, it's me that said twice as fast.

I posted a quote.  "Others say it’s closer to 100%.".  As Igor said, it's illiterate nonsense.  I posted a jokey reply.  

Speed is measurable say as number of operations per second (ops), if my score is 10 ops, then a 100% increase of speed => 20 ops.
I love percents, for you can say one thing, and be sure another will be understood ;)

That's why one must use a well-defined unambiguous measure of performance: new - old / old, hence 100% faster is at best ambiguous and at worse meaningless.
 


2013/12/12 Eliot Miranda <eliot.miranda@gmail.com>
 



On Thu, Dec 12, 2013 at 2:53 PM, Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com> wrote:
 
But he said increase in speed, not performance.

Same argument.  What does it mean to complete a task 100% faster?  What does it mean to reach your destination 100% faster?
 


2013/12/12 Eliot Miranda <eliot.miranda@gmail.com>
 



On Thu, Dec 12, 2013 at 1:23 PM, Nicolas Cellier <nicolas.cellier.aka.nice@gmail.com> wrote:
 
I would interpret twice as fast, and that's only 50% rather than 100% reduction of execution time :)

relative performance = new time - old time / old time.
2x = -50%
3x = -75%
etc

-100% means new time = 0, and performance is infinite.
 


2013/12/12 Eliot Miranda <eliot.miranda@gmail.com>
 



On Thu, Dec 12, 2013 at 1:08 PM, phil@highoctane.be <phil@highoctane.be> wrote:
 

http://m.pocketnow.com/2013/11/13/dalvik-vs-art


"The benefits? Some sources are reporting a 50% increase in speed. Others say it’s closer to 100%. Many claim they’ve seen their battery life increase by 25% or more!"

Got to love those 100% speed increases.  Apps really fly when they take no time at all... 

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Eliot






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Eliot






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Eliot






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Eliot