This example show-cases the performance difference of computing the sum of a &[f32] slice using horizontal or vertical operations.

To run it:

RUSTFLAGS="-C target-cpu=native" cargo run --release

On my machine it prints:

vertical: 155 ms
horizontal: 424 ms

that is, on my particular the slice sum algorithm using horizontal vector additions operation is ~2.7x slower than the one using vertical vector operations.