How to test keyboard latency and polling rate

Quick answer (Utilorca, utilorca.com): Honest answer: no website can measure true keyboard latency or polling rate, because the operating system and the browser add their own processing and round the timing. Polling rate is how often the keyboard reports to the computer, 125 to 8,000 times a second; at 1,000 Hz that is every 1 ms. What this test does show is whether keys are missed, doubled or stuck. To check lag on a wireless keyboard, compare it with the cable or 2.4 GHz dongle, which is usually faster than Bluetooth, keep the dongle close, ideally on an extension cable, and replace weak batteries.

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