Its really not, have you noticed how an enum is transpiled? you end up with a function... a lot of other things follow the same pattern.

That is not a good example. That is an immediate function call happening once when the program starts and certainly does not have a large impact like you are suggesting.

Yeah sure, you found the one notorious TypeScript feature that actually emits code, but a) this feature is recommended against and not used much to my knowledge and, more importantly, b) you cannot tell me that you genuinely believe the use of TypeScript enums – which generate extra function calls for a very limited number of operations – will 5x the energy consumption of the entire program.