Stick Drift Test
Measure idle center offset.
Controller Polling Rate Test
Move a stick or press buttons to estimate browser-visible gamepad update frequency. Use it to compare wired, Bluetooth and 2.4G modes under the same browser and system.
controller polling rate testgamepad Hzinput stabilityBluetooth vs wired
Browser-Level Hz, Not USB Analyzer Data
The Gamepad API exposes timestamps when the browser sees controller changes. ControllerTest converts those deltas into an estimated update rate and stability score.
For the cleanest comparison, close heavy apps, test the same controller in the same browser, and move a stick continuously for several seconds.
Pair With Health Checks
Polling stability is only one part of controller condition. Drift, trigger range and circularity usually matter more for gameplay feel.
Input Test
Watch raw button and axis values.
Xbox Controller Tester
Run the same checks on Xbox pads.