How can the degree of improvement in user interface performance be assessed?

The improvement of interface performance can be assessed using:

• Measuring UI response time (e.g., time from press to reaction).
• Using profilers (Android Profiler in Android Studio) to analyze CPU load, memory, and rendering.
• Comparing FPS (frames per second) metrics before and after optimizations.
• Conducting usability tests with real users to evaluate subjective perceptions of speed.

Example: if after optimization, the screen load time decreased from 2 seconds to 1 second, it is a clear performance improvement.