Speed optimisation

VPN speed depends on the distance to the server, the quality of your network and the protocol in use. These tips noticeably improve speed in most cases.

#Pick a nearby, quiet server

• Choose the location with the lowest ping (latency) on the home screen. Under 100 ms is ideal.
• The Fast filter puts low-latency, lightly loaded servers first.
• A country close to you is usually the fastest.

#How the protocol matters

Colitu tries Hysteria2 first. Hysteria2 runs over QUIC (UDP) and is much faster than TCP-based protocols on mobile networks with packet loss. If your network restricts UDP, Colitu switches to VLESS Reality automatically. Details: Protocols.

#Check your network

• Run a speed test with the VPN off. The VPN cannot be faster than your raw connection.
• Use 5 GHz Wi-Fi instead of 2.4 GHz and move closer to the router.
• Wait if large downloads or cloud sync are running in the background.

#On the device

• Power-saving modes can slow the processor and therefore encryption.
• On Windows, system proxy mode for browser traffic is lighter than TUN mode.

#Why is it sometimes slow?

In the evening your provider's international links can get congested. Trying another location usually helps. If one server stays slow, tell support the server name; we watch server load live.