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A single Speed Test is Fun — Hundreds of them, may actually be more accurate. NordLynx outperformed other protocols, but there were some cases with slightly worse speed results. NordVPN: How many tests should you take to be certain that one protocol is faster than another? Let’s take a deep dive into the confidence of our speed testing results and see if we can tick all the boxes on accurate measurement. To make a valid comparison, we need to make sure to equalize environmental conditions. To avoid falling into such a statistical nightmare, observations of each test combination should be distributed across 24 hours.