You asked Windows to sleep for 1 millisecond. It slept for 15.6. Windows 11 silently ignores timeBeginPeriod for throttled processes and returns success anyway, and NtQueryTimerResolution reports a global number your process never receives. timerlag measures the timer resolution your process actually gets. Zero dependencies, read-only.
windows performance gaming powershell latency diagnostics qpc zero-dependencies timer-resolution timebeginperiod
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Updated
Sep 12, 2026 - PowerShell