Before blaming the proxy server, run this simple test:
If no explicit DNS config is provided, V2Ray defaults to the system’s DNS resolver (via Go’s net.Resolver). This is often slow due to:
Why slowness happens: A single misconfigured or high-latency upstream DNS server blocks the entire resolution pipeline.
Run these commands from your server/PC (replace 1.1.1.1 with your V2Ray upstream DNS): v2ray slow dns server
# UDP latency dig @1.1.1.1 google.com +timeout=2By default, most V2Ray setups use a split routing strategy (freedom for domestic traffic, proxy for international). For this to work, V2Ray must resolve a domain name to an IP address before deciding where to send the packet.
Here is the hidden delay:
If step #4 takes 500ms, your entire browsing session feels like dial-up. Before blaming the proxy server, run this simple
If Query time > 100ms consistently, your upstream is slow. Run these commands from your server/PC (replace 1
Some ISPs rate-limit DNS queries to non-default resolvers, causing artificial delays or TCP fallback.
V2Ray is a tool for constructing versatile proxies to bypass network restrictions. It supports multiple protocols and can be used with various transport protocols, including TCP, WebSocket, and more. DNS (Domain Name System) plays a crucial role in how V2Ray and similar tools operate, as it translates domain names into IP addresses.