sandpit 0.5.3

A concurrent garbage collected arena
Documentation 
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use criterion::{criterion_group, criterion_main, Criterion};

use sandpit::{Arena, Gc, Root};

fn mutate_and_alloc(c: &mut Criterion) {
    let arena: Arena<Root![Gc<'_, usize>]> = Arena::new(|mu| {
        let root = Gc::new(mu, 69);

        root
    });

    arena.mutate(|mu, _| {
        c.bench_function("alloc usize", |b| {
            b.iter(|| Gc::new(mu, 123usize));
        });
    });

    c.bench_function("enter mutation", |b| {
        b.iter(|| {
            arena.mutate(|_mu, root| {
                assert!(**root == 69);
            });
        });
    });
}

criterion_group!(benches, mutate_and_alloc);
criterion_main!(benches);