[Feature]: Provide Guidance or Power Fx Functions to Assert Performance Metrics

[Grant-Archibald-MS]

Is your feature request related to a problem? Please describe.

It is essential to ensure that Power Apps meet performance criteria such as time to load and responsiveness. Currently, there is limited guidance or built-in functionality to assert these performance metrics within the Power Apps Test Engine.

Describe the solution you'd like

Propose providing detailed guidance or introducing Power Fx functions that allow users to assert performance metrics. For example, functions to measure the time to load an app or start/stop timers could be included.

For example This solution could leverage the No Cliffs extensibility model to add timers and metrics for testing and validation, ensuring that applications fit within defined usage criteria.

This could be something like the followig or

Set(Start,StartTimer())
...
Set(End,EndTimer())
Assert(End - Start < 2000, "Longer than 2 seconds")

Describe alternatives you've considered

No response

Additional context?

No response