.NET/C# - What is the best option instead of an ActionBlock<T> (or Channel<T>) for speed?

Question

corefxlab has something called a Channel which is a really nice implementation of an async PC queue and definitely does what I'm looking for. I'm curious if there's an implementation that ultimately had a similar API to ActionBlock<T> :

1. Must be able to accept/deny from multiple producers.
2. Only needs to have one consuming task but would be preferable that it continue processing until empty. Then 'wait' for new items.

A Channel<T> is much faster than an BufferBlock<T> but I'm just curious if given the specific requirements if there was something even faster.

Answer 1

According to a readme by Stephen Toub, Channels might end up being the underlying implementation around some Dataflow blocks. Channels wins for PC queue async speed.