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🚀 Performance: iOS interview questions

  1. How do you profile an app in Instruments: Time Profiler, Allocations, Leaks, Hangs? Middle PRO
  2. What makes up app launch time and how do you measure it? Senior PRO
  3. What are hangs and hitches? Why must the main thread stay free? Middle PRO
  4. How do you make scrolling smooth: cell reuse, prefetching, image decoding? Middle PRO
  5. How do you speed up SwiftUI: identity, body cost and Observation granularity? Senior PRO
  6. How do you reduce the memory footprint and stay clear of jetsam? Senior PRO
  7. How do you save battery: background work, location, networking? Middle PRO
  8. How do you reduce app size? Middle PRO
  9. What is MetricKit and how do you collect performance metrics from real devices? Senior PRO
  10. Performance questions in interviews: how to answer? Senior PRO

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