Which is more effective to create a pop up?

So, there is two ways I know to create pop up

First it to place object in the same layer and set it to invisible, so whenever player trigger something the object will become visible and create a pop up

Second to create second layer, so wheneever player trigger something, the layer will become visible which is invisible before and create pop up effect

Which is more effective?

Thanks

Create a sprite (object), keep it invisible. When you need it, create CMD to make it visible in your needed position.

Based on my experiences First one is better.

Create a sprite (object), keep it invisible. When you need it, create CMD to make it visible in your needed position.

Based on my experiences First one is better.

Isn't too many objects on layer can slow down the game ?

May be the answer is relying on how construct compiles the game out.