Re: Not normal for the same program to be faster in C# than in C++ [Visual Studio 2019]

On 2021-08-06 04:58, George Neuner wrote:


> I would modify your programs like so (in pseudo):
>
> total = 0
> allocate array
> for N iterations
> initialize array
> start = current time
> run the seive
> stop = current time
> total += (stop - start)
> average = total / N


Another technique is factoring out looping and other overheads by
running empty loop as a reference:


        start = current time
        for N iterations
              initialize array
              run the sieve
        end loop;
        total1 = start - current time


        start = current time
        for N iterations
              initialize array
        end loop;
        total2 = start - current time


        average = (total1 - total2) / N -- sieve only


P.S. Optimizations is a usual suspect of ruining benchmark measures.


--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de

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