Two connected in-memory transports. Frames are delivered asynchronously (on a microtask) and by reference — no cloning takes place, so this is a test and in-process tool, not a serialisation check.
Two connected in-memory transports. Frames are delivered asynchronously (on a microtask) and by reference — no cloning takes place, so this is a test and in-process tool, not a serialisation check.