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Description
Problem
The text scaling implementation in BigTextDisplay has performance issues:
- Font size calculations run on every render and can cause jank
- No memoization of expensive calculations
- Reflows happen too frequently when typing quickly
- Layout measurements are triggered excessively
Impact
Poor user experience with laggy text input, especially on lower-end devices.
Acceptance Criteria
- Memoize expensive font size calculations
- Reduce frequency of layout measurements
- Optimize text scaling algorithm
- Add performance monitoring for text input
- Test on low-end devices
Priority
High - directly affects core app functionality
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