Given the wide variety of devices that your UWP app can run on, it is important to track performance to ensure you are not being wasteful. Users appreciate improved battery life, and a responsive app is always appreciated by users. VS2015 has several app performance and diagnostic tools available that can help you measure and review its performance to ensure it is as efficient as needed.
The Diagnostic Tools menu provides the following tools:
Application Timeline: See where your app spends most of its time.
CPU Sampling: Analyze which of the functions being used by your app are using the most CPU time.
CPU Usage: Examine where the CPU is spending its time. Helpful when the CPU is the limiting factor.
GPU Usage: Review and monitor GPU usage. Helpful when the GPU is the limiting factor.
Memory Usage: Used to help find memory leaks, and examine how your app is using memory.
Network: Provides for the monitoring of all network traffic used by your app.
Energy Consumption...