Searching Google for the exact text in the slide doesn't yield any results. So perhaps that was part of the post author's angst...that the numbers were presented in a venue where they wouldn't get much scrutiny?
If you look at that blog post he posted benchmarks (again without posting the source or methodology) and be compared Deno vs Node vs uWebsockets.js which is just a small C library with a thin JS layer on top.
It seems like they are promoting their own library and doing a bit of their own deception by including a small library in their tests. Particularly a library that was designed entirely to perform well at that particular usecase (high throughout for small bits of data).
Searching Google for the exact text in the slide doesn't yield any results. So perhaps that was part of the post author's angst...that the numbers were presented in a venue where they wouldn't get much scrutiny?
Edit: I did find that the author has posted previously about Deno, and seems to not be a fan: https://unetworkingab.medium.com/deno-is-slow-and-why-associ...