What will you do if you are tasked with fixing a long startup time in an outdated project?

I will conduct profiling using Android Studio (CPU Profiler, Startup Profiler) to identify bottlenecks, analyze CPU load, network, disk, and thread blocking.

I use the following approaches for optimization:

• Deferred initialization: Moving non-urgent tasks after startup or on demand.
• Database optimization: Indexing, query optimization, deferred data loading.
• Reducing the size of the view hierarchy: Using <include>, <merge>, ConstraintLayout.
• Optimizing background threads and async operations: Using WorkManager, coroutines, proper lifecycle management.
• Reducing APK size: Removing unused resources, graphics optimization, ProGuard/R8.
• Data caching: Network requests, heavy computations.
• Analyzing and fixing main thread blocking issues.

The work will be iterative: measurement, optimization, re-measurement. Special attention will be paid to the main thread and tasks executed in Application.onCreate() and the first Activity.onCreate().