MeasureSleep is used to measure the precision of Sleep(n). By default, it sits in an infinite loop measuring the sleep deltas, but you can use the --samples argument to get average and STDEV metrics.

SetTimerResolution is used to request a higher resolution by calling NtSetTimerResolution. As an example to automatically start a hidden instance of the program when the system starts and raise the resolution to 0.5ms, place the binary somewhere safe and create a scheduled task in task scheduler (instructions) with the command below as an example.

According to a comment on the Great Rule Change article, on Windows Server 2022+ and Windows 11+, the registry key below can also be used so that requesting a higher resolution is effective on a system-wide level rather than only the calling process. This should only be used for debugging purposes.

The micro-adjust-benchmark.ps1 script can be used to automate the process of plotting precision against resolutions. The results can be visualized with chart-studio.plotly.com.