seniorSwift
How do you debug performance bottlenecks in iOS apps?
Updated May 17, 2026
Short answer
Use Instruments, Time Profiler, Memory Graph, and signpost logging to identify bottlenecks.
Deep explanation
Performance debugging involves identifying CPU spikes, memory leaks, and slow rendering. Time Profiler shows hot functions, Allocations track memory usage, and Core Animation instrument detects UI lag. Signposts help trace custom execution flow.
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