How to use instance count to create 100 models?

Hello, I'm instantiate 100 complicated flower models in JS using prefab.instantiate(), but it's getting very slow. What is the alter to spawn many copies of same mesh? 
I see a page about using material to instantiate objects, not sure if I understand it correctly. https://lensstudio.snapchat.com/material-editor-3-0/nodes/inputs/shader/node_input_shader_instance_count/ 

Are there any instructions/ examples on how to use material instance count to make model copies? Because the document doesn't say anything about how to use it. Thank you very much!