We will explain the principles used in the the implementation of OpenTelemetry in Quarkus. How we prepared a performance test setup with Hyperfoil to evaluate the impact of using OpenTelemetry on a reference application containing REST endpoints and using Hibernate persistence to store data on a PostgreSQL DB. The performance test setup compares the application while using Quarkus standalone, with the OpenTelemetry extension and with the stock OpenTelemetry agent. Like in all performance tests, conclusions should not be extrapolated to other setups, but we expect the journey and the conclusions we got will be enlightening.