To add a data point for Elixir: https://gist.github.com/neon-sunset/8fcc31d6853ebcde3b45dc7a...

Note 1: The gist is in Ukrainian, and the blog post by Steve does a much better job, but hopefully you will find this useful. Feel free to replicate the results and post them.

Note 2: The absolute numbers do not necessarily imply good/bad. Both Go and BEAM focus on userspace scheduling and its fairness. Stackful coroutines have their own advantages. I think where the blog post's data is most relevant is understanding the advantages of stackless coroutines when it comes to "highly granular" concurrency - dispatching concurrent requests, fanning out to process many small items at once, etc. In any case, I did not expect sibling comments to go onto praising Node.js, is it really that surprising for event loop based concurrency? :)

Also, if you are an Elixir aficionado and were impressed by C#'s numbers - know that they translate ~1:1 to F# now that it has task CE, just sayin'.

Here's how the program looks in F#:

    open System
    open System.Threading.Tasks

    let argv = Environment.GetCommandLineArgs()

    [1..int argv[1]]
    |> Seq.map (fun _ -> Task.Delay(TimeSpan.FromSeconds 10.0))
    |> Task.WaitAll