Then it is fair to compare the memory usage of a stackful coroutine to a stack less one as they are the idiomatic way to perform async task on each language.

I mean this is subjective, but as long as it’s clear that one number is “this is the memory the runtime itself consumes to solve this problem” and the other number is “this is the runtime memory use and it includes pre-allocated stack space that a real application would then use”, sure

Point being: Someone reading this to choose which runtime will fit their use case needs to be carefully to not assume the numbers measure the same thing. For some real world use cases the pre allocated stack will perform better than the runtimes that instead will do heap allocations.

Of course, as any microbenchmark, the bare results are useless. The numbers can be interesting only if you take the time to understand the implications.