How smooth load a lot of gameobjects?

Unity Engine
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1

Hi~

My game is a open world. So here a lot of gameObjects and models will load at runtime.

I load them use coroutine. But still laggy(low FPS).

Is here any method could improve ths load processing?

2

Are you sure the lag is because of the loading? Usually the bottleneck is more because there are too many objects on screen.
Did you check the profiler?

3

Is it laggy after the objects have initially loaded in or is it just during the initial load? If it’s just during the initial load you could implement a loading screen to wait on things to load.

Here are some options that can help cut down load time and processing:

  • GPU Instancing
  • Static Batching
  • Occlusion Culling
  • Fewer lights, as each light causes each material it’s illuminating to have an additional shader pass.
  • Fewer colliders, as each collider causes more physics checks.
  • Using layers, CompareTag, and Physics.IgnoreCollision in combination to cut down on collision checks.
  • Fewer materials.
  • More simple shaders. Eliminate parts of shaders that aren’t being utilized.
  • Fewer objects.
  • Fewer meshes.
  • More simplified meshes. Utilize tools such as the Mesh Optimizer asset or Blender’s Decimate modifier.
  • Fewer uses of GetComponent. Pre-cache components when possible.
  • Pre-caching of transforms and gameobjects if they’re used in scripts. Each call to .transform or .gameObject is more processing time.
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4

other alternatives:

  • asset store has some world streaming plugins
  • can use DOTS subscenes (unity megacity demo is in github and uses it)
  • can load regular scenes with additive async *but certainly still noticeable lag when object gets created(?) especially with large meshes with colliders…
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5

Thank you!