public void TestMillionEntitySystem()
{
const int size = 100_000;
var gameWorld = new GameWorld();
var entities = new GameEntityHandle[size];
gameWorld.CreateEntityBulk(entities);
var componentType = gameWorld.AsComponentType<IntComponent>();
for (var i = 0; i < size; i++)
{
gameWorld.AddComponent(entities[i], componentType);
}
var sw = new Stopwatch();
var lowest = TimeSpan.MaxValue;
using var runner = new ThreadBatchRunner(1f);
runner.StartPerformanceCriticalSection();
var query = new EntityQuery(gameWorld, new[] {componentType});
var system = new ArchetypeSystem<int>((in ReadOnlySpan<GameEntityHandle> entities, in SystemState<int> state) =>
{
var accessor = new ComponentDataAccessor<IntComponent>(state.World);
foreach (ref readonly var entity in entities)
accessor[entity].Value++;
}, query);
public void TestBulk()
{
var lowest = TimeSpan.MaxValue;
var entities = new GameEntityHandle[entityCount];
for (var iteration = 0; iteration != 100; iteration++)
{
var world = new GameWorld();
var sw = new Stopwatch();
var componentType = world.AsComponentType <Component>();
sw.Start();
world.CreateEntityBulk(entities);
for (var i = 0; i != entityCount; i++)
{
var ent = entities[i];
world.AddComponent(ent, componentType);
world.RemoveEntity(ent);
}
sw.Stop();
if (lowest > sw.Elapsed)
{
lowest = sw.Elapsed;
}
}
Console.WriteLine($"{lowest.TotalMilliseconds}ms");
}
public ComponentDataAccessor(GameWorld gameWorld, ComponentType original = default)
{
var componentType = original.Id == 0 ? gameWorld.AsComponentType(typeof(T)) : original;
Source = ((SingleComponentBoard)gameWorld
.Boards
.ComponentType
.ComponentBoardColumns[(int)componentType.Id]).AsSpan <T>();
Links = gameWorld.Boards.Entity.GetComponentColumn(componentType.Id);
}
protected internal override void KeepAlive(Span <bool> keep, Span <GameEntity> resources)
{
var componentType = gameWorld.AsComponentType <TData>();
if (!(gameWorld.Boards.ComponentType.ComponentBoardColumns[(int)componentType.Id] is SingleComponentBoard componentBoard))
{
return;
}
var dataSpan = componentBoard.AsSpan <TData>();
// It should be of the same length
KeepAlive(keep, dataSpan, MemoryMarshal.Cast <GameEntity, GameResource <TResource> >(resources));
}
protected internal override void KeepAlive(Span <bool> keep, Span <GameEntity> resources)
{
var componentType = gameWorld.AsComponentType <TBuffer>();
if (!(gameWorld.Boards.ComponentType.ComponentBoardColumns[(int)componentType.Id] is BufferComponentBoard bufferComponentBoard))
{
return;
}
var rawBufferSpan = bufferComponentBoard.AsSpan();
for (var i = 0; i != rawBufferSpan.Length; i++)
{
var buffer = new ComponentBuffer <TBuffer>(rawBufferSpan[i]);
KeepAlive(keep, buffer.Span, MemoryMarshal.Cast <GameEntity, GameResource <TResource> >(resources));
}
}
