Top 3 performance-counters open source projects

Generic Windows library designed to help detecting issues related to high PC uptime

Extremely useful library for collecting and tracking performance metrics in your .NET application

A dedicated performance counter for Cortex-M systick. It shares the SysTick with users' original SysTick function without interfere it. This library will bring new functionalities, such as performance counter, delay_us and clock() service defined in time.h