I want to see when my entire test suite is getting faster or slower. Presently, it's very hard to infer this.
We have separate stages in our workflow: build, lint, config check, security, unittests. Most stages run in about a minute. Unit tests take some time longer (up to 10 minutes).
I want to be able to compare the run time of a stage across branches/builds, or the runtime of the entire workflow across branches/builds.