I have a 3D game in Unity and I use blender to design models for it. My game has a feature where if you click a button, an object is cloned. An example from my game is a tree that is cloned around 100 times with different sizes and positions to form a forest. The issue is that after a few presses of the button, the game starts to really lag. Is there a way to optimise the game in Unity or optimise the models in Blender to reduce this lag? I use the instantiate function in Unity to do my cloning.