V2ray Slow Dns: Server

If Query time > 100ms consistently, your upstream is slow.

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: v2ray slow dns server

A Reddit user reported the classic "V2Ray slow DNS server" symptom: curl https://google.com via proxy took 3.2 seconds, but curl https://1.1.1.1 took 120ms.

Diagnosis: The V2Ray server was using Google's public DNS (8.8.8.8). The server was in Frankfurt. The client was in Sydney. If Query time > 100ms consistently, your upstream

The path:

Total latency for DNS resolution: 270ms + download time. Total latency for DNS resolution: 270ms + download time

The fix:

Result: DNS resolution dropped to 8ms (cached) to 45ms (uncached). Total page load dropped to 400ms.

Before fixing the problem, you need hard evidence that DNS is the bottleneck. Do not guess.

If you still see slowness: