PS2 SG

Latency of an input from a PS2 Wired SG Guitar.

Measured by connecting it to the microcontroller in question, and then sending a signal to toggle the strum up input, and timing how long it takes that signal to reach a target device over USB. Note that the console only polls this controller every 10ms or so. The developers of the controller took this into account, and the controller will lock up if it is polled too quickly.

microcontroller	Pi Pico	Sparkfun Pro Micro 5V	Sparkfun Pro Micro 3.3V	Arduino Uno	Pi Pico	Sparkfun Pro Micro 5V	Sparkfun Pro Micro 3.3V	Arduino Uno
firmware	new	new	new	new	old	old	old	old
controller	PS2 SG	PS2 SG	PS2 SG	PS2 SG	PS2 SG	PS2 SG	PS2 SG	PS2 SG
poll rate	1 ms	1 ms	1 ms	1 ms	1 ms	1 ms	1 ms	1 ms
min	3.54 ms	4.02 ms	4.14 ms	6.04 ms	3.92 ms	4.82 ms	5.2 ms	1.77 ms
max	10.06 ms	12.36 ms	10.84 ms	12.96 ms	10.23 ms	13.48 ms	11.46 ms	12.07 ms
avg	6.68 ms	7.68 ms	7.39 ms	9.66 ms	6.96 ms	8.77 ms	8.4 ms	8.55 ms
stddev	1.6 ms	1.8 ms	1.69 ms	1.77 ms	1.63 ms	1.89 ms	1.62 ms	1.75 ms
%on time	60%	54%	56%	42%	58%	47%	50%	49%
%1f skip	40%	46%	44%	58%	42%	53%	50%	51%
%2f skip	0%	0%	0%	0%	0%	0%	0%	0%
%3f skip	0%	0%	0%	0%	0%	0%	0%	0%

Note that in the below graph, you can click on legends to show and hide different controllers when comparing.