Hello all!

I'm currently working on a dev-kit for 2D Danmaku (Bullet Hell) style games, and I'm running into a brick wall on making sure firing and moving bullets is a lightweight operation.

My current solution is like this:

1. A BulletManager class acts both as a pool, and a factory for the variety of bullet behaviors.
2. Bullets are individually represented by a Projectile class, which isn't a script attached to the bullet object, but rather is a normal C# object managed exclusively by the BulletManager. A lightweight GameObject with only a SpriteRenderer is generated via "new GameObject()" and "AddComponent" to avoid the computational cost of Instantiate.
3. Movement is managed via subclasses of Projectile, like LinearProjectile which just moves it in a straight line via direct manipulation of the GameObject's Transform.

I can only get about 10,000 bullets on the screen before the frame rate drops.

I don't have Unity Pro, so I don't have a profiler to use.

Any suggestions on how to further optimize?