We do not have a profiling tool for the application…

Logging: Adding logs with timestamps and important information about critical code sections.

// Logging function execution time
val startTime = System.currentTimeMillis()
performComplexCalculation()
val endTime = System.currentTimeMillis()
Log.d("Performance", "Complex calculation took ${endTime - startTime} ms")

System call System.currentTimeMillis(): Measuring execution time of individual functions or code blocks.
Console output (println): A simple way to check code execution and variable values.
Debugger: Step-by-step code execution, viewing variable values, setting breakpoints.
Unit tests: Writing tests to verify the correctness of individual components, which can indirectly reveal performance issues in edge cases.
Network inspector (if network is available): Checking network requests, their durations, and traffic.
Source code analysis: Manual analysis of code for potentially "heavy" operations (infinite loops, redundant calls, blocking operations on the UI thread).
Static code analyzer: Using tools (e.g., Lint in Android Studio) to identify potential problems and errors.
Simplified scenarios: Running the app on an emulator with different configurations (weak processor, low RAM) to identify performance issues.
Feedback collection: Gathering feedback from other developers or testers using the app on their devices.

We do not have a profiling tool for the application. What steps would you take to review the code?