evio

o is probably a valid one, but it is completely baseless to say that "go has no place in new code". The concurrency model in golang with channels makes more sense to someone more familiar with python/javascript who hasn't been exposed to threading or other concurrency models. If you can understand basic coroutines/channels you get the benefits of golangs concurrency (and even parallelism) without much effort, or code complexity, with an order of magnitude more performance that python or javascript for the same feature set. The profiling tools in golang are also first class (pprof, trace, ect) With pprof, its easy to see even traces of different coroutines, heap allocations, cumulative allocations, these are even safe to sample on production running services and this is provided by the standard library. There are even built in tools to profile GC. The argument that tooling and monitoring doesn't exist in golang is simply not true.

involved. Writing code in this style of async doesn't feel very Go-like and when you look at an example of some code using this style its exactly the thing Go was trying to avoid with goroutines (https://github.com/tidwall/evio/blob/master/examples/http-se...). You end up with async event-based code, not the clean synchronous-appearing Go code that goroutines and channels provide.