libfxdiv-dev 0.0~git20200417.b408327-3 (armhf binary) in ubuntu hirsute

 On modern CPUs and GPUs integer division is several times slower than
 multiplication. FXdiv implements an algorithm to replace an integer division
 with a multiplication and two shifts. This algorithm improves performance when
 an application performs repeated divisions by the same divisor.
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 This is a header-only library.