同样的平均延迟，有的机器打游戏很稳、有的忽快忽慢——差在”抖动”。
一句话解释
延迟不是恒定的，每个数据包的延迟有高有低。抖动（Jitter）就是这种波动的幅度。低抖动=延迟一直稳在某个值；高抖动=延迟在大范围内乱跳（比如 50ms 和 200ms 之间反复）。
它影响什么
- 语音 / 视频通话、直播、游戏、远程桌面：最怕抖动，会出现卡顿、声音断续、画面卡帧。
- 普通网页浏览、下载：影响较小。
怎么看
连续 ping 一段时间，看延迟的波动范围；或用 mtr 看每跳的 StDev（标准差），越小越稳。
提醒
平均延迟低 ≠ 稳。一台平均 延迟 不错但抖动大的机器，实时应用体验照样差。要稳定低抖动，优先选精品 回程线路。
挑线路稳、延迟低的在售机型？去 库存监控 按线路 / 地区筛选。
Two servers with the same average latency can feel completely different in games — one smooth, one all over the place. The culprit is “jitter.”
One-Line Explanation
Latency isn’t constant — each packet arrives with a slightly different delay. Jitter is the size of that variation. Low jitter means latency stays steady; high jitter means latency swings wildly (e.g., bouncing between 50 ms and 200 ms).
What It Affects
- Voice/video calls, live streaming, gaming, remote desktop: these are the most sensitive to jitter — you’ll get stutters, choppy audio, and frozen frames.
- Regular web browsing and file downloads: largely unaffected.
How to Measure It
Run ping continuously for a period and observe how much the latency swings; or use mtr to check the StDev (standard deviation) at each hop — the lower, the more stable.
Reminder
Low average latency ≠ stable connection. A server with decent average latency but high jitter will still deliver a poor experience for real-time applications. For stable, low-jitter performance, prioritize premium return routes.
Looking for stable, low-latency plans? Visit the stock monitor and filter by network route / region.
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