Very high RenderQuery Result time when having a lot of impostor objects in screen

[CakeDragon]

I thought impostors are supposed to improve the performance. However, showing the highest LOD has a better performance than showing the impostor objects. Am i doing something wrong here? Or is this because I'm using unreal engine 4.26?

[CakeDragon]

I found the cause. Don't use 8k textures ;)