PodTui/tasks/merged-waveform/09-waveform-performance-optimization.md

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)