NBTTagCompound vs HashMap

[Alpvax]

So I will be instantiating some of my classes from NBTTagCompounds as well as from other methods, and I need to be able to pass in a variable number of variable-type arguments. I could either pass them in as a Map<String,Object> or pass in an NBTTagCompound, and just keep a reference to the nbt inside my instance.

Obviously the latter would be easier, and is what entities and itemstacks do, but what is the additional overhead vs a HashMap?

[UberAffe]

actual NBTTagCompounds are Maps internally anyways. I don't know how much overhead it adds and I don't imagine it adds much but it does have more overhead.