The async.js library has awful semantics - promises are an improvement in every way compared to it, whether it is reasons of flow, readability, and even perf (b

The async.js library has awful semantics - promises are an improvement in every way compared to it, whether it is reasons of flow, readability, and even perf (bluebird is quite faster). The catchall try-catch is my major dislike for async-await though. The only way to exit the async-await loop being to throw is overkill, and makes it more complicated to localize different desired flow branching.