Objective:
For Task<T> and ValueTask<T> (T=int as a common non-trivial but inlineable case), compare async performance in
the synchronous scenario (i.e. where data happens to be buffered - common in deserialization etc code) for 3 implementations:
- using
awaitthroughout - using synchronous code until incompleteness detected (via
IsCompleted); switch via localasync Awaitedif needed - using synchronous code until incompleteness detected (via
IsCompletedSuccessfully); switch via localasync Awaitedif needed
Note:

