Exactly. The difference at least some of these tests is measuring between the two is idiomatic modern JS (promise, map, careful variable scoping) with fast & loose old-school c-like JavaScript (for loops, global vars galore). Typescript has little to do with it.

Typescript can use only of these, so it does make sense to have it on the list. Clearly it doesn't fall right next to JavaScript in the results. It is a benchmark of language implementations not runtimes. This is why JRuby, C# and F# are on the list, one uses the JVM and the latter two both use the CLR. Different languages.