This is a usable example plugin to demonstrate how to build your own telemetry and performance tracing plugin using the oneRepo plugin API and internal performance entries.
Using a PerformanceObserver, it listens for performance marks and converts them into measurements from onerepo_start_ to onerepo_end_ prefixed entries. On CLI shutdown, the measurements will be written to a file for later operation.
No metrics or information are shared anywhere outside of your local environment.
npm install --save-dev @onerepo/plugin-performance-writer