Were to start lower cpu usage?(TickCompletionEvents) (C++)

Hello

I have done some very simple test to try and gauge what level of performance i can get out of the box. And from just placing 128 SkeletalMeshActors with no animation i get below 60FPS in editor. But i only get 5ms on GPU time according to Unreal stats and Game logic around 19ms.

Have also tried with tried place the BP_ThirdPersonCharacter just to see if i get any diffrent resaults, but i hade similar performance. Have also tried with 256 SkeletalMeshActors and got around 30-40 fps.

This is just a standard ThirdPerson starter project in C++.

When i look in unreal insights i can see that updating Animation and skeleton just taking 4ms. And i can see about 10ms total for TickCompletionEvents.

Questions:
What do TickCompletionEvents in this contex?

Where should i begin to start lower the CPU usage? Multithreading?

Any suggestions of were to start looking would be helpful.

PC Specs:
GPU: Geforce 4080
CPU: Ryzen 5900x
RAM: 64GB

Setup

Unreal Insight

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