Benchmark selection

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For selecting groups of hashes for focused benchmarking, it might be useful to select all of the ones in a particular family:

Doesn't sound economic

I wasn't being clear. I added that as a related topic - the idea that it would be nice to have a way to run all benchmarks in a given family -- not for the default benchmark, but something that a user could run on request.

What I meant with economic is that it creates alot of developing overhead but I think not many people will make use of it.