[MemoryDiagnoser]
[GroupBenchmarksBy(BenchmarkLogicalGroupRule.ByCategory, BenchmarkLogicalGroupRule.ByParams)]
public class ObjectPoolBenchmark
{
    [Benchmark()]
    public void GetFromEmpty()
    {
        var pool = new ObjectPool<object>(Allocator, size: 10);
        AllocateItems(pool);
    }

    [Benchmark()]
    public void GetFromFilledWithOne()
    {
        var pool = new ObjectPool<object>(Allocator, size: 10);
        pool.Free(Allocator());
        AllocateItems(pool);
    }

    [Benchmark()]
    public void GetFromAlmostFull()
    {
        var pool = new ObjectPool<object>(Allocator, size: 10);
        for (int i = 0; i < 9; i++)
            pool.Free(Allocator());

        AllocateItems(pool);
    }

    [Benchmark()]
    public void GetFromFullyFilled()
    {
        var pool = new ObjectPool<object>(Allocator, size: 10);
        for (int i = 0; i < 11; i++)
            pool.Free(Allocator());

        AllocateItems(pool);
    }

    private static void AllocateItems(ObjectPool<object> pool)
    {
        for (int i = 0; i < 12; i++)
            pool.Allocate();
    }

    private static object Allocator()
        => new object();
}