Writing / Instruments
Instruments
5 essays tagged Instruments.
2026
Performance budgets for SwiftUI screensHow to define practical performance budgets for SwiftUI screens, measure regressions, and avoid both slow interfaces and premature optimization.15 min readOSLog signposts with Instruments: connecting logs to hangsHow to use OSLog signposts, intervals, and Instruments together so performance investigations connect user actions to real latency and hangs.11 min readInstruments beyond memory leaks: Time Profiler, hang detection, and energy auditsHow to use Time Profiler, the Hangs instrument, and energy logging to find performance and battery problems before users report them.11 min readFinding memory leaks in iOS apps without wasting a day in InstrumentsMemory leaks are not solved by staring at Instruments until the graph confesses. Start with ownership, reproduce the leak, prove deallocation, then use Instruments for the cases that actually deserve it.11 min readApp launch performance in 2026: first-frame thinking, cold-start budgets, and practical fixesA practical way to measure iOS cold start and ship improvements: define a first-frame budget, diagnose the common failure modes, and verify changes with repeatable runs.6 min read