45% slower means..?
Suppose native code takes 2 units of time to execute.
“45% slower” is???
Would it be 45% _more time?_
What would “45% _faster_” mean?
Suppose native code takes 2 units of time to execute.
“45% slower” is???
Would it be 45% _more time?_
What would “45% _faster_” mean?
(I think I would generally use "x% slower" to mean "slower by a factor of 1+x/100", and "x% faster" to mean "faster by a factor of 1+x/100", so "x% slower" and "x% faster" are not inverses, you can perfectly well be 300% faster or 300% slower, etc. I less confidently think that this is how most people use such language.)
If the original process took 30 minutes to process 10 items, how long would the 300% faster method take?
But then it's hard to make sense of the idea that 300% slower is 5 items per hour (if I'm understanding correctly), since it works differently from "75% less than 20 is 5".
If I read "300% slower", I like to think about time, not speed.
300% more time = 400% original time = 4 times as long = 1/4 the speed
I think it is easier to understand in terms of throughput.
So 45% less work per unit of time, so 55% of the work.
10% slower means "takes 10% longer." 10% more seconds.
So 45% slower than 2 seconds is 1.45 * 2 = 2.9 seconds.