Performance (Measure, Then Optimize)

When to use

• Jank (missed frames) during scrolling, animations, or screen transitions.
• Slow startup, slow screen open, or large memory usage.
• Large lists/images causing stutters.
• Heavy parsing/formatting done in the UI layer.

Steps

1) Measure first (don’t guess)

Use Flutter DevTools:

• frame chart (UI vs raster time)
• CPU profiler
• memory (leaks, churn)