lykos
Internal data representation of an empty tuple
Hi,
I am trying to figure out why :erts_debug.size({}) returns 0. The function returns the number of words taken up in the heap. For an empty list, it makes sense since the empty list will be represented by the immediate nil term. But does an empty tuple also have a similar representation that does not take up any space in the heap. Shouldn’t the empty tuple still have a boxed term as the container and a header word in the heap?
Thank you.
Marked As Solved
garazdawi
It is an optimization for zero arity tuples: arm jit opt: emit_i_is_tagged_tuple and emit_i_is_tagged_tuple_ff by kjellwinblad · Pull Request #5259 · erlang/otp · GitHub
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