In reply to Jeffrey.

A fair point. We'll definitely have more contents than just "Hello world" stuff. Creating a good test environment is the second task on our ToDo list, just behind the search of good plugins to test against. We want this to be as objective as possible, so we'll really try to make an environment that can highlight both the strengths and the weaknesses.
In the spirit of this being a scientific project, after we assemble our test environment, we plan to make it available on GitHub, in case there will be someone who wants to try and reproduce our results.

P.S. Big thanks to Jeff Chandler for covering this!