Baseline USB
Start with a wired run to set a stable comparison point.
Controller Latency Test
Use browser-visible polling and input updates to compare controller latency symptoms across USB, Bluetooth and 2.4G setups on the same system.
controller latency testinput delaypolling rateBluetooth vs USBgamepad lag
Browser Latency Limits
A web page cannot measure end-to-end display latency like a hardware rig. It can still show update stability, dropped input patterns and polling differences between connection modes.
For useful comparisons, test the same controller in the same browser, close heavy apps and repeat the sample after switching between USB, Bluetooth and adapters.
Latency Comparison Checklist
Use the same sequence each time so changes in polling stability are easier to interpret.
Bluetooth Pass
Repeat the same movement and look for unstable update intervals.
Input Confirmation
Use the live input grid to catch stuck or delayed-looking buttons.