This was originally posted on my blog: https://rhonabwy.com/2019/01/06/adding-tracing-with-jaeger-to-an-express-application/ I have been following distributed tracing technologies — Zipkin, OpenTracing, Jaeger, and others — for several years, without deeply trialing with any of them. Just prior to the holidays, we were having a number of those “why is this slow?” questions about an express application, written in typescript, providing an API endpoint. The API fronts multiple different…