Parallelizing a busted test suite

[Hugo Musso Gualandi <hgualandi@...>]

I'm trying to speed up how long it takes for busted to run my test
suite. I'm getting the impression that it is running all the tests
sequentially, one after the other... Is there a way to ask busted to
run multiple tests in parallel, using more than one process or thread?
Or do I need to improvise by running multiple instances of busted in
parallel, one for each spec file?

-- Hugo