I believe that for the purpose of this discussion that will be a waste of your time. There is no disagreement on whether move from v1 to v3 has a potential to improve performance. And this is what such benchmarks are intended to show.I am going to benchmark the performance difference between the various x86 uarch levels. I will be using Phoronix Test Suite, which has some support for performing compiler and compile flag benchmarks.
Yes, synthetic tests are expected to show improvement. So are specific tasks, which naturally benefit from tuning for newer CPUs. But those results will not answer the important question: whether there is a considerable improvement for a typical user.
Anyway, the current status is to provide two repositories: one generic x86_64 and one for x86_64-v3. This is not only solving the problem. With two repositories user may simply choose the optimized version and everyone can compare the options during their normal, daily work.
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