Data driven API

api.d

struct Transform {
	float x, y, z;
}

struct Velocity {
	float x, y, z;
}

enum entityCountMax = 1_000_000;
enum entityCountMin =   100_000;

HashmapComponentStorage!Transform transformStorage;
HashmapComponentStorage!Velocity velocityStorage;

foreach(index; 0..entityCountMin) {
	velocityStorage.add(EntityId(index), Velocity(1, 1, 1));
}
foreach(index; 0..entityCountMax) {
	transformStorage.add(EntityId(index), Transform(0, 0, 0));
}

auto query = componentQuery(transformStorage, velocityStorage);

foreach(row; query)
{
	row.transform.x += row.velocity.x;
	row.transform.y += row.velocity.y;
	row.transform.z += row.velocity.z;
}

// Time 0.035,439 secs