Niko Matsakis wrote: > On Apr 20, 2009, at 8:36 PM, Jacob Hallén wrote: > >> I think this formulation is a bit confusing. It is not our speed >> that is 0.8-2x CPython, it is our performance relative to CPython >> that is between 0.8 and 2, with 0.8 meaning that we are faster than >> CPython on those benchmarks, and 2 meaning that we need twice the >> time to run the benchmark. > > Maybe I am a bit confused, but I don't see a difference between those > two things? > > i.e., if the speed is 0.8x CPython, to me that means that it runs in > 80% of CPython's time (i.e., faster), whereas 2x CPython would be > twice as much time. > > In any case, I agree that the second formulation is phrased more > clearly, just curious if my understanding of 0.8x is flawed. >
Hi Niko, FWIW, that's the reasoning we had when we wrote the thing. However, we keep having this discussion every time we write something about performance, so I guess it's not as clear as you and me think :-). Carl Friedrich _______________________________________________ [email protected] http://codespeak.net/mailman/listinfo/pypy-dev
