How come my FPS drop in surface pro??

After searching the planet of google, I can't understand why my FPS is dropping.

I'm developing a game for Surface pro, using the UWP platform.
I have a huge frame rate drop on Surface pro. After following this post:
https://forum.unity.com/threads/uwp-lower-framerate-than-standalone-slower-fps-than-exe.501892/

I've looked into the resolution of the app.The optimized resolution on the tablet is: width: 3240, height: 2160
I've setup this resolution in code but its being ignored or changed based on the target machine.

This is my code:

Code (CSharp):

1.     private void Start()
2.     {
3.         Application.targetFrameRate = 300;
4.         //Screen.SetResolution(1920, 1080, true);
5.         Screen.SetResolution(3240, 2160, true);
6.         screenResolution.text = "Screen resolution : " + Screen.currentResolution.ToString() + "Screen Width : " + Screen.width + "Screen Height : " + Screen.height;
7.         targetFrameRate.text = Application.targetFrameRate.ToString();
8.         Debug.Log(Screen.currentResolution);
9.     }

In the pictures, the number 300 indicates target frame rate.
This is how it looks in the editor:


This is how it looks in the visual studio build on pc:



This is how it looks on surfacePro:


So I see resolution script only works correctly (except for the height) in the build. Is that how its supposed to be?

As you can see the scene is very simple. How come the frame rate drops??

 

The only way to answer this is to attach the profiler to your running target and start investigating.

 

Hmm, that is a very high resolution for a tablet I think. I also notice you are doing the opposite of what the linked thread suggested. They scaled the resolution down from the tablet's native, but you are trying to run at its max resolution. Are you sure your tablet can handle that load?

 

How do I attach a profiler to an app on a surface pro tablet?
I saw this documentation, https://docs.unity3d.com/Manual/windowsstore-profiler.html
but it's not clear enough