Comment 1 for bug 1546661

Agreed this would be a big improvement.

Unfortunately it's not clear to me if any of the train code is thread safe (it runs entirely single threaded, shelling out to various tools synchronously).

Fortunately this bug was filled at a good time as there will be a major refactoring happening to get train code run by bileto instead of Jenkins, so parallelization is something i can roll in at the same time that I'm switching everything over.

Gimme a few months ;-)