In an effort to figure out how fast/slow my various boards are, I wrote a floating point benchmark to help compare.
So far, compared to my UNO, My DUE is 3.3x. My STM32 Discovery board (475 iot) / mbed is 4x. And to my surprise my WEMOS D1/R2 @160 is 7.5x.
I was really surprised by the D1. I may start standardising on this one, WiFi or not.
subversion project is at https://svn.riouxsvn.com/blindally-pub/bench2
There should be enough information in the platform.ini to make whatever board you have work.