Display test's time in ms

[tanx]

One killer feature of qunit, that prevents me from switching to mocha completely for my browser tests, is the display of required time in milliseconds. This allows me to abuse my unit tests for simple benchmarking/profiling and iterate quickly to tweek performance.

Mocha currently only displays the time for longer tests: http://whiteout-io.github.io/crypto-lib/test/index.html

What would be awesome if there was an option to always display runtime like so:

[tj]

well test cases make horrible benchmarks, I'd definitely recommend against that beyond the really obvious crazy cases where something went really wrong, but we do display the times taken if they exceed --slow

[csvan]

+1, I agree with @tj that this does not have any real benchmark application, but it's an interesting metric all the same.

[dchambers]

This is already possible using the -s or --slow flag to set "'slow' test threshold in milliseconds", for example:

mocha test -s 0

[rash240719]

Why does timing appear only sometimes?

[sangowen]

@rash240719
It probably happened because those tests finished under 1ms and their durations were considered 0ms, which are not slow when -s 0.
I believe that this is the only case not being shown by the default reporter.

ref: https://stackoverflow.com/a/32055699