12. Conclusion: Queue is the Perfect Harmony of Fairness and Efficiency
When I first learned about queues, I thought, "It's just standing in line." But as I dug deeper, I understood: queues are the core tool that makes systems stable.
- In BFS, they guarantee shortest paths.
- In message queues, they absorb traffic spikes.
- In blocking queues, they solve thread synchronization.
- In event loops, they implement async execution.
Ultimately, queues efficiently implement the simple principle of fairness. Now when I see a queue, I clearly understand "why it's needed." And that's proof I truly understand queues.