As with all benchmarks, benchmark your workload. The tech empower stuff is gamed, like all rankings. But first and foremost, concurrency is not parallelism [1]

As with all benchmarks, benchmark your workload. The tech empower stuff is gamed, like all rankings. But first and foremost, concurrency is not parallelism [1]. In my practical experience dealing with both, asycn is a language semantic for concurrency, threads are an OS feature for parallelism. It's a little nonsensical to ask the pros/cons since they are different entirely ; you can use both at the same time (and in practice most async implementations use threads) [1] https://www.youtube.com/watch?v=oV9rvDllKEg https://www.youtube.com/watch?v=oV9rvDllKEg "Concurrency is not Parallelism" talk by Rob Pike.