New Clash client users often open the node list and feel lost at a wall of unfamiliar names and numbers: is 80ms good latency, or is 800ms fine too? What does "2x" or "3x" in a node's name mean? Should you pick a Hong Kong node or a Japan node? And when Shadowsocks, VMess, Trojan, and Hysteria2 all show up in the same list, which one should you trust? This article breaks node selection down into four independent, judgeable dimensions, so by the end you can score a node list yourself instead of clicking at random.
What the latency number actually means
The latency figure shown next to each node in the Clash client is usually the round-trip time measured when the client sends a request to a test endpoint (for example, Google's connectivity check page) through that node, expressed in milliseconds. This number reflects the current response speed of the path "your device → the node server → the test endpoint" — it is not a fixed property of the node. The same node can show latency differing by tens or even hundreds of milliseconds at different times, depending on how congested the carrier's route is at that moment.
A rough rule of thumb: under 200ms, web browsing and most apps run smoothly; between 200–500ms, web pages are still usable but video calls and real-time gaming feel noticeably laggy; above 800ms or a straight timeout means the route is essentially unusable right now and isn't worth forcing. Keep in mind that latency only measures "how fast the response is," not "how fast the download is." A node with very low latency can still be slow for large file transfers if its bandwidth is throttled — which is why some users see normal latency numbers but still can't get downloads moving.
Don't draw conclusions from a single latency test. For the same node, test two or three times at different moments and judge based on the more stable readings — a one-off result is easily skewed by momentary network fluctuations.
Traffic multipliers and how they affect your data plan
The "0.5x," "1x," "2x," "3x" tags commonly seen in node names are traffic multipliers, indicating how much of your plan's data allowance is actually consumed relative to the real traffic transferred through that node. A lower multiplier means the same data allowance lasts longer; a higher multiplier usually means the route costs more to run (for example, dedicated line relaying or more generous bandwidth), and it eats into your allowance faster.
- 0.5x nodes: common on standard routes, consuming only half the actual traffic against your allowance — good for everyday browsing and messaging apps where speed demands aren't extreme.
- 1x nodes: the standard multiplier, where speed and consumption are calculated 1:1 — the default choice for most situations.
- 2x / 3x nodes: typically better route quality and more bandwidth, suited for HD video streaming and large file downloads, but they burn through your allowance faster, so users with limited data should use them sparingly.
The rule is simple: for light everyday use, prefer low-multiplier nodes to save data; switch temporarily to a high-multiplier node when you need heavy bandwidth (video, file transfers), then switch back once you're done. This keeps performance solid without draining your monthly allowance early.
Region choice: closer to the target, not closer to you
Many newcomers assume "the physically closest node is always the fastest," which is only half right. The real principle behind region selection is to be close to the service you're trying to reach, not close to your own physical location. For example, if the service you're accessing is hosted in the United States, choosing a US node is usually more direct than choosing a node in a country near you, because the data only needs to hop "you → node → target server" — one less detour.
However, if the service itself applies regional content restrictions (some streaming and financial services show different content based on IP location), region selection then has to follow what the target service requires, not simply the lowest latency — no matter how low the latency, a region mismatch can still get the request rejected or flagged.
For everyday browsing with no specific regional requirement (say, you just want a stable route abroad), try this order: start with the lowest-latency node at a suitable multiplier as your default; if a specific site feels slow or loads poorly, manually switch to a node in the region where that site's main servers are hosted and compare — in most cases the difference will be noticeable right away.
Don't assume "more nodes is always better." Hoarding a dozen nodes in the same region without ever testing them is worse than picking three or four consistently low-latency nodes and rotating between them, paired with an auto-speed-test group for switching — that's far more manageable.
Protocol differences: speed, stability, and censorship resistance
Terms like Shadowsocks, VMess, Trojan, and Hysteria2 that show up in node names or groups refer to the proxy protocol a node uses. Different protocols work differently under the hood, which directly affects connection speed and stability in complex network environments.
| Protocol | Transport Characteristics | Best For |
|---|---|---|
| Shadowsocks | TCP-based, low encryption overhead, fast connection setup | Everyday light use; good compatibility, the longest-established protocol |
| VMess / VLESS | Can be paired with WebSocket, TLS and other transport-layer disguises | Networks requiring stronger censorship resistance |
| Trojan | TLS-based, disguised as normal HTTPS traffic | Better stability under stricter traffic inspection |
| Hysteria2 | QUIC/UDP-based, faster packet-loss recovery on poor networks | Mobile networks, long cross-border routes, high-bandwidth needs |
For most users, there's no need to obsess over which protocol is inherently "best" — implementation quality for the same protocol varies a lot between providers. A more practical approach: if a single subscription offers multiple protocols for nodes in the same region, test the latency and actual download speed of each, and stick with whichever performs most consistently. If a particular protocol's nodes keep dropping or their latency swings wildly, switching to a node using a different protocol often fixes it immediately.
Combining all four dimensions into one workflow
Looking at latency, multiplier, region, or protocol in isolation tends to miss the bigger picture. In practice, work through them in this order rather than fixating on a single metric:
Filter by region first
Identify which region the service you mainly access is hosted in, and narrow your candidates down to nodes in that region — skip nodes in unrelated regions entirely.
Then sort by latency
Within the filtered region, compare latency values and keep the nodes with stable, acceptable latency, ruling out anything that's obviously off or frequently times out.
Weigh it against the multiplier
If your data plan has plenty of headroom, just pick the lowest-latency node; if data is limited, favor low-multiplier nodes as your daily default and save high-multiplier nodes for bandwidth-heavy tasks.
Fine-tune with protocol last
If several protocols are available at the same region and multiplier, run an actual speed test on each and set whichever performs consistently well over time as your primary node, keeping the others as backups.
Once you've worked through this process, apply the results to your policy groups: put your frequently used nodes into an auto-switching group based on url-test, so the client automatically switches to whichever performs best at any given moment; for scenarios that require a fixed region for a particular service, use a separate select group to manually pin the node, so auto-switching doesn't disrupt regional consistency for that use case. This saves you the hassle of manually comparing every time while still giving you precise control where it matters.
Quick answers to common questions
If a node shows "timeout" or the latency stays grayed out, it's usually unavailable right now or the test request is being blocked — switch to another node rather than retesting the same dead one repeatedly. If every node shows abnormal latency, the issue is almost always local network or client configuration rather than the provider — check your system proxy settings and DNS configuration first. If a subscription lists many nodes but few are usable, rather than testing each one manually, rely on the client's built-in bulk speed test to quickly filter out the currently usable, low-latency ones, then pick your regulars from that shortlist using the four dimensions above.