Unity spawning lots of objects at runtime running slow

Question

I've created a simple project where approx. 7000 cubes are created in the scene (with VR camera) but the problem is that when I move camera to see all cubes the FPS becomes very bad, something like 5-6 frames. My PC is i7 with GTX 1070, and I thought that it have to draw hundred thousands of cubes without any problems. Really, I saw minecraft, it looks like there no problems to draw cubes ))

So question is is it possible to optimize the scene so that all cubes are painted it one call or something to provide a good performance?

I'm actually made all cubes static and there are no textures only standard material...

Here is how it looks now:

I'm using default Directional Light and It would be good to not change the standard shader because of it great work with light.

Here is how I'm generating the cubes:

private void AddCube(Vector3 coords)
{
    var particle = (Transform)MonoBehaviour.Instantiate(prototype.transform, holder.transform);

    SetScale(particle);
    SetPosition(particle, coords);

    cubes.Add(particle.gameObject);
    particle.gameObject.isStatic = true;

}

private void SetScale(Transform particle)
{
    particle.localScale = new Vector3(Scale, Scale, Scale);
}

private void SetPosition(Transform particle, Vector3 coords)
{
    particle.position = coords;
}

This is the screenshot of Stats: I have here 41 fps because I moved camera away from cubes to have clean background for the stats panel. Actually after I'm making the cubes 'static' the FPS is depends on are the cubes visible on the screen or not.

Answer 1

The problem is most likely caused by number of individual objects you are instantiating. If cubes doesnt change their transform after generating you should be able to use StaticBatchingUtility to combine them into one batch.

Call this after generating cubes.

StaticBatchingUtility.Combine(GameObject cubesRoot);