Gander is a preconfigured Open Telemetry stack relying on Prometheus, Grafana, and Grafana Tempo.
ddev get tag1consulting/ddev-gander, run Drupal core's OpenTelemetry phpunit tests, and immediately see performance metrics and traces in a Grafana dashboard. Or add PerformanceTestBase coverage to an existing project with a few lines of code if you already have phpunit functional test coverage of your project.
For more information on the phpunit side of things, see the Drupal core change record.
For more information and a quickstart guide, check the documentation on Drupal.org.