What this latency test can tell you
The page arms a sample, waits for the next controller button input, and records an estimated browser response delay. The number includes browser scheduling and rendering behavior, so it is best used for comparing your own connection modes rather than claiming an absolute hardware specification.
Run several samples per connection method. A single spike can come from background load, display refresh timing, Bluetooth interference, or a browser task.
- Compare USB, Bluetooth, and 2.4 GHz receiver sessions.
- Keep recent records in localStorage for this device only.
- Use polling rate results beside latency records for a fuller connection picture.
How to reduce noisy samples
Close heavy background tabs, use the same browser, keep the display refresh rate unchanged, and test with the controller near the receiver or Bluetooth adapter. If Bluetooth samples vary widely, retest over USB before blaming the controller.
Browser and hardware limits
Gamepad API support, haptic feedback, MediaRecorder, and WebHID are exposed differently across Chrome, Edge, Firefox, Safari, Linux, mobile browsers, USB, Bluetooth, and third-party drivers. For Controller Latency Test, treat that limit as part of controller latency test guidance rather than as a separate verdict.
A missing feature in the browser does not prove that the controller is damaged. Use the live readings as diagnostic hints and compare results across connection methods when possible. On this Controller Latency Test page, compare that note with the live module that matches the article steps, the browser readings they depend on, and the practical decision the reader needs to make.
Controller latency test notes
A controller latency test in the browser measures response timing as the page can observe it. It includes browser scheduling and rendering, so it should be used for relative comparison rather than absolute hardware claims. The controller latency test is strongest when you compare two connection methods on the same setup.
When a controller latency test feels inconsistent, repeat the sample after reducing background load. Close streaming tabs, keep display refresh rate steady, and test USB before Bluetooth. A clear controller latency test note should include connection method, browser, operating system, and whether the result matched what you felt in a game.
- Use controller latency test results as relative evidence.
- Compare only one changed variable at a time.
- Pair controller latency test notes with polling rate notes.