When diagnosing your Kodi device, one of the common tests is checking how well your storage performs I/O operations (read and write), so you can compare it to other storage devices. The I/O Benchmark add-on writes a file to your storage and then reads this file to test the I/O performance. Don’t be alarmed by poor results as it doesn’t necessarily mean your Kodi device is slow.

Here are the instructions on how to install I/O Benchmark:
- Launch Kodi
- Click Add-ons
- Click the Add-on browser icon
- Click Install from repository
- Click Kodi Add-on repository
- Click Program add-ons
- Click I/O Benchmark
- Click Install
- Wait till you see an Add-on installed message
Once executing the add-on you see the benchmark of the I/O of your storage compared to other storage devices.