I think the size of the bar is actually ms/x so because Riot.js does more x's in the same period of time, the bar is shorter.
The bars are relative to data in it's own category (eg. 200x), you're comparing apples to oranges.
mmm. Well there's no scale & no explanation of this method so it's not really clear what's going on. I get what is meant now, but there really should be a scale here to make it clear or at least an explanation.
Thanks for the short way of explaining how it works. Will add this exact clarification on the site.