I'm of two minds with regards to this: This is cool but unless you have no authentication, data to fetch remotely or on disk this is really just telling you what the ceiling is for everything you could possibly run.
As for this article, there are so many knobs that you tweaked to get this to run faster it's incredibly informative. Thank you for sharing.
If you're talking about monospace fonts well, eliminating layout variation eliminates noise. Spacing is predictable, so that gives you hints at a glance that your code is correct, line from line.