The basic claim that I'm making wrt to this benchmark is that there may be a significant impact on performance with changing the block size, thus this is worth investigating. I think this claim is quite safe, even if the benchmark is not the best possible.

Well, you went straight to making it something adjustable at run time.

What I really did was to go straight to asking the question:-)

Up to now I have two answers, or really caveats:

 - a varying blocksize implementation should have minimum effects
   on performance for user of the default settings.

 - the said benchmark may not be that meaningful, so the performance
   impact is to be accessed more thoroughly.

And I don't see that as being warranted at this point. But further benchmarks sound like a good idea.

Yep. A 10% potential performance impact looks worth the investigation.


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