use criterion::{criterion_group, Criterion}; const SIZE: usize = 1024 * 1024; fn setup(c: &mut Criterion) { c.bench_function("iter_with_setup", |b| { b.iter_with_setup(|| (0..SIZE).map(|i| i as u8).collect::>(), |v| v) }); } criterion_group!(benches, setup);