This is the supporting benchmark for this post about the behavior of std::fill depending on the exactly type of the to-be-filled value.

I have tested this on Linux and on Windows using Windows Subsystem for Linux.

Build

make

Running

./bench

The output on my Skylake i7-6700HQ host is:

Function   bytes/cycle     ns/byte cycles/byte

fill1              1.0        0.39        1.00
fill2             29.2        0.01        0.03