Just to clarify: * Julia has had tasks/co-routines basically forever and uses them for all blocking operations so that no explicit non-blocking I/O or callback

Just to clarify: * Julia has had tasks/co-routines basically forever and uses them for all blocking operations so that no explicit non-blocking I/O or callbacks are required. * It also supports multithreading using the @threads macro. * However, it does not yet map tasks to threads, but that is very close to ready: https://github.com/JuliaLang/julia/pull/22631 https://github.com/JuliaLang/julia/pull/22631. We expect this work to be finished in a near-future 1.x release and then Julia will support M:N multiplexing.