Trapov

namespace ForVsForeach
{
    using System.Buffers;
    using System;
    using BenchmarkDotNet.Attributes;
    using BenchmarkDotNet.Configs;
    using BenchmarkDotNet.Jobs;
    using BenchmarkDotNet.Running;
    using System.Collections.Generic;

Trapov

BenchmarkDotNet=v0.11.5, OS=Windows 10.0.17763.475 (1809/October2018Update/Redstone5)
AMD A4-6300 APU with Radeon(tm) HD Graphics, 1 CPU, 2 logical cores and 1 physical core
.NET Core SDK=2.2.104
  [Host] : .NET Core 2.2.2 (CoreCLR 4.6.27317.07, CoreFX 4.6.27318.02), 64bit RyuJIT
  Core   : .NET Core 2.2.2 (CoreCLR 4.6.27317.07, CoreFX 4.6.27318.02), 64bit RyuJIT

Job=Core  Runtime=Core  

Trapov

public sealed class CircullarList<T>
{
    private readonly IReadOnlyList<T> _data;
    public CircullarList(IReadOnlyList<T> data) => _data = data;

    public T Current(in int index) => _data[index];
    public T Next(in int index) => _data[index+1 % _data.Count];
    public T Previous(in int index) => index-1 > 0 ? _data[index-1] : _data[_data.Count - 1];
}

Trapov

class EntityHolder<TEntity> : IEntityHolder<TEntity>
    where TEntity : IEntity, new()
{  
    public int Count { get; private set; }
    public ushort TypeId { get; set; }
    public Func<TEntity> EntityCreator { get; }
    
    public EntityHolder(ushort typeId)
    {
        TypeId = typeId;