I want to use the same data structures for - Passing small messages around - Doing streaming of large content (occasionally) I'm probably doing these over di

I want to use the same data structures for - Passing small messages around - Doing streaming of large content (occasionally) I'm probably doing these over different pipes, but the data shares a lot of the same characteristics and I don't want to use two totally different APIs to get the job done. "Large" can be "I need to transfer something on the order of megabytes using a 4K intermediate buffer."