Updated July 2026 · 6 min read
Which proxy group type to use
select, url-test, fallback and load-balance behave very differently. Pick the wrong one and your exit keeps jumping, or sites log you out for no obvious reason.
What each group type actually does
select does what you tell it: the node you click is the node you use, and the choice survives a restart. url-test re-tests every node in the group on a timer and keeps whichever answers fastest.
fallback ignores speed entirely. It walks your list in order and takes the first reachable entry, moving on only when an earlier one dies. load-balance spreads requests across several nodes at once.
The layout that causes the least trouble
Put one select group on the outside for regions, and a url-test group inside each region. Switching Hong Kong to Japan is one click, and the machine inside that region gets picked for you.
If only two or three nodes in your subscription are genuinely stable, fallback beats url-test — it will not swap exits over a 40 ms fluctuation.
Clicking a node inside a url-test group does not stick — the next latency check overwrites it. Pin an exit in a select group instead.
interval and tolerance belong together
interval is the test cycle in seconds. Set it too low and the group never settles; 300 is fine for everyday use, 180 if latency really matters to you.
tolerance is a margin in milliseconds and defaults to 0, so a node that is 1 ms faster wins. Set it to 50–100 and the group only switches when the gain is real, which stops video and downloads from being cut.
Think twice before using load-balance
It splits concurrent requests across exits, so the server watches your IP change constantly. Sessions, captchas and anything with fraud checks will throw you out.
If you do need it, set strategy to consistent-hashing so one domain always maps to one node. round-robin only suits mirrors and bulk downloads that do not care who you are.
What is the project?
Clash Verge Rev is a Tauri-based GUI for Mihomo with profile management, system proxy, TUN mode, rule editing and WebDAV backups.