# 09. Optimize Waveform Rendering Performance

meta:
  id: merged-waveform-09
  feature: merged-waveform
  priority: P3
  depends_on: [merged-waveform-08]
  tags: [performance, optimization]

objective:
- Ensure waveform rendering doesn't cause performance issues
- Optimize for terminal TUI environment
- Minimize CPU and memory usage

deliverables:
- Performance optimizations
- Memory management for waveform data
- Performance monitoring and testing

steps:
1. Profile waveform rendering performance
2. Optimize data point generation and updates
3. Implement waveform data caching
4. Add performance monitoring
5. Test with long audio files

tests:
- Performance: Measure CPU usage during playback
- Performance: Measure memory usage over time
- Load test: Test with 30+ minute audio files

acceptance_criteria:
- Waveform rendering < 16ms per frame
- No memory leaks during extended playback
- Smooth playback even with waveform rendering

validation:
- Profile CPU usage during playback
- Monitor memory over 30-minute playback session
- Test with multiple simultaneous audio files

notes:
- Consider reducing waveform resolution during playback
- Cache waveform data to avoid regeneration
- Use efficient data structures for waveform points
- Test on slower terminals (e.g., tmux)