Every operation response allocates a temporary heap array the size of the response

https://github.com/couchbase/couchbase-net-client/blob/aa48cd66f537a79ae6f4f5a7d603f7db2b0a5cc6/src/Couchbase/Core/IO/Connections/MultiplexingConnection.cs#L219

This is allocating a temporary array on the heap the size of the entire operation body just to read a single byte. This is particularly problematic for large responses. We are incurring both a (potentially large) heap allocation and a memory copy operation.