[eigen] Eigen Benchmark (number of FLOPS)

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On the website http://eigen.tuxfamily.org/index.php?title=Benchmark you
show some pretty impressive comparison of Eigen's performance.
I have two consecutive questions:

1. Do the different implementations/library of BLAS functions differ in
the number of floating point operations (FLOP) they need to complete?

2. If yes: Did you calculate the FLOP per second using some reference
FLOP number or the number of actual performed FLOP of each

Thank you for your answer,


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