use criterion::{black_box, criterion_group, criterion_main, Criterion};

use hwphysics::{

    common::GearId,

    data::{GearDataManager}

};

#[derive(Clone, Copy, Default)]

struct V {

    position: u64,

    velocity: u64

}

pub fn benchmark(c: &mut Criterion) {

    const SIZE: usize = 4 * 1024;

    let mut items = [V::default(); SIZE];

    c.bench_function("array run", |b| b.iter(|| {

        for item in &mut items {

            item.velocity += black_box(item.position);

        }

    }));

    let mut manager = GearDataManager::new();

    manager.register::<V>();

    for i in 1..=items.len() {

        let gear_id = GearId::new(i as u16).unwrap();

        manager.add(gear_id, &items[i - 1]);

    }

    c.bench_function("component run", |b| b.iter(|| {

        manager.iter().run(|(item,): (&mut V,)| item.velocity += black_box(item.position) );

    }));

}

criterion_group!(benches, benchmark);

criterion_main!(benches);