It will be a closure "fun () -> ...", and it's serialized bytecode + a copy of captured variables — remember, they all are immutable. For a intra-node call it w

It will be a closure "fun () -> ...", and it's serialized bytecode + a copy of captured variables — remember, they all are immutable. For a intra-node call it will be a reference to the bytecode, no need to copy anything. However if this code refers to any functions from modules via syntax "foo:bar/1" then these references will be resolved on the target node, and both nodes better have the same versions of modules loaded.