3 ms·
https://danluu.com/keyboard-latency/ https://danluu.com/keyboard-latency/
by nextos 7y ago
https://danluu.com/keyboard-latency/ https://danluu.com/keyboard-latency/
- willis936 7y agoUnfortunately that’s only half good. It’s more typical to measure peripheral latency by connecting an LED to the switch to see when it’s actuated. This person performed an Apple 2s to oranges measurement by not controlling his keypress speed and not testing the Apple 2. The conclusions are based on feelings. Keyboard electronics are simple so short of severe mistakes they add negligible latency. HIDs are connected to interrupts so the OS should get the input pronto. The insanely large software stack will slow things down, but it isn’t the keyboard’s fault. Edit: to exemplify the issue with this test: a poorly implemented capacitive touch keyboard would add 10 ms of latency and feel sluggish yet would be at the top of this chart.