as a developer I'd like to have nanosecond precision for test duration

In reports lots of tests have duration = 0. This is because unit tests are fast and the System.currentTimeMillis() is used to record start and end time of a test. Which is not precise by design.

We could increase precision to nanoseconds using System.nanoTime().

Note: we'd still need to call System.currentTimeMillis() to record datetime when test was run.