Real-time System Design

Challenge

Users expect instant feedback; any delay affects the experience.

Design Principles

1. Event-Driven - Use Observer pattern
2. Async Processing - Database writes don't block UI
3. Batch Updates - Reduce repaint frequency

Technical Implementation

// Use BackgroundWorker for async data saving
private void OnTagRead(string tagId) {
    UpdateUI(tagId); // Immediately update interface
    Task.Run(() => SaveToDatabase(tagId)); // Async save
}

Performance Metrics

• UI response time < 50ms
• Database write < 100ms
• Audio feedback < 20ms