How to reproduce:
1. Open the attached "1076284_repro.zip" project
2. Set the Target Platform to "UWP"
3. In the Build Settings, enable Development Build, Autoconnect Profiler, and Script Debugging options
4. In the Publishing Settings, enable InternetClient, InternetClientServer, and PrivateNetworkClientServer capabilities
5. Set the Scripting Backend to ".NET"
6. Build the project and run on Hololens
7. Observe the Profiler data in the Unity Editor
8. Set the Scripting Backend to "IL2CPP"
9. Again, build the project and run on Hololens
10. Observe the Profiler data in the Unity Editor

Expected result: Setting Scripting Backend to IL2CPP does not result in the worse application performance.
Actual result: Application runs slower when Scripting Backend is set to IL2CPP.

Reproducible with - 2018.2.11f1, 2018.3.0b4, 2019.1.0a3

Note: The methods that were used when reproducing the issue are a part of BoundingBox (from MixedRealityDesignLabs) functionality.