iOS Performance Standards

Priority: P0

Implementation Guidelines

Diagnostic Tools

• Instruments: Regularly use Allocations and Leaks to detect memory issues.
• Time Profiler: Identify heavy CPU tasks and Main Thread stalls.
• Network instrument: Analyze request payload sizes and frequency.

Optimization

• Table/Collection Views: Always use dequeueReusableCell and keep cellForRowAt logic lightweight.
• Image Caching: Use SDWebImage or Kingfisher for remote assets to prevent redundant fetching and main-thread decoding. (Note: AsyncImage lacks built-in caching; prioritize third-party for lists).
• Background threads: Offload expensive work (parsing, encryption) from the Main thread using GCD or Tasks.

Diagnostics