The Speed Test Trap
Everyone runs a speed test, sees a drop, and blames the VPN. Often the real bottleneck is nothing to do with the tunnel protocol. Before you switch providers, work through the usual suspects in order.
1. Server Distance and Load
The single biggest factor is physical distance between you and the exit server, plus how busy that server is. A server three thousand kilometers away adds latency no protocol can remove. Pick the nearest server that meets your needs, and retry when one is congested.
2. Your Base Connection
A VPN cannot add speed you do not have. On hotel Wi-Fi that delivers 20 Mbps, even a perfect tunnel returns roughly 20 Mbps minus overhead. Measure the raw connection first, then compare the tunneled result against that baseline rather than against your home fiber number.
3. The Protocol Stack
Modern WireGuard-based setups consistently beat older OpenVPN configurations on the same hardware, often by a wide margin on mobile where CPU matters. If your provider lets you choose, run WireGuard and keep the tunnel MTU at the value the provider recommends (usually 1420 or lower).
4. Congestion and Packet Loss
A UDP-based tunnel is sensitive to loss on the last mile. If the network is dropping packets, throughput collapses even at low latency. Run a quick ping for a minute; any loss means the network is the problem and no VPN tweak will fix it. Try a different network (mobile data is a good test).
5. MTU and Fragmentation
An MTU that is too high forces IP fragmentation, which many firewalls drop silently. The classic symptom is web pages that load halfway or hang on the first request. Lower the tunnel MTU in steps of 20 until browsing is stable.
Measure, Then Fix
Work through the list in this order and you will usually find the culprit is distance, congestion, or base bandwidth, not the VPN itself. Only after ruling those out does the provider become the suspect worth replacing.
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