I just came across this article on performance testing of Python frameworks:
The Hacker News discussion is here:
https://news.ycombinator.com/item?id=26188765
It occurs to me that re-implementing the test code in this article using Javascript, Meteor, and MongoDB, then comparing the results for various Galaxy configurations, would be a great first step toward providing the community with useful performance data. If nothing else, it would provide a sense for how Meteor performance compares to Python web frameworks at least for these simple systems.
Philip