use std::hint::black_box;
fn main() {
let input_size = 100_000_000;
let mut output = vec![0; input_size as usize];
let left = (0..input_size).collect::<Vec<u64>>();
let right = (0..input_size).collect::<Vec<u64>>();
let output_slice = output.as_mut_slice();
let left_slice = left.as_slice();
let right_slice = right.as_slice();
black_box(left_slice)
.iter()
.zip(black_box(right_slice).iter())
.zip(black_box(output_slice.iter_mut()))
.for_each(|((a, b), out)| *out = *a + *b);
println!("added {} elements", black_box(output).len());
}