axiom-performance-profiling

Profile iOS app performance using Time Profiler in Instruments to measure CPU usage and pinpoint UI lag hotspots. Record a representative session on-device to capture accurate metrics and identify the exact functions causing slowdowns.

Track memory growth and leaks using the Allocations profiler in Instruments to monitor cache behavior across user sessions. This helps identify memory spikes and abnormal allocation patterns that lead to app bloat or crashes.

Diagnose Core Data fetch inefficiencies by using Instruments to profile data fetch and relationship loading behaviors. The profiler reveals inefficient queries and lazy loading patterns that degrade app responsiveness.

Measure battery drain and energy impact by using the Energy Impact profiler in Instruments during an on-device recording session. This identifies background tasks and resource consumption patterns draining battery life.

Choose System Trace over Time Profiler when you need to profile low-level system interactions and thread scheduling issues rather than just CPU hotspots. System Trace captures detailed kernel and system-level events for deeper bottleneck analysis.

You can profile iOS app performance on both physical devices and the simulator, but on-device profiling is recommended for accurate CPU, memory, and battery metrics. The simulator runs on your Mac hardware and does not reflect real device constraints.