Comment by joshuamorton

I don't think the research is public, because it's all entirely about internal tools, but yes the conclusion was that the got interface for perforce led to less efficient development across basically any metric you could look at (LoC, commit count, self-reported efficacy, etc.). Note that if you judge developers based on commit count is a bad metric, but comparing LoC throughout of developers who are evaluated on other metrics isn't problematic.