If you look at the the StackOverflow in my sibling comment to yours, running 'obj.attrname' on a namedtuple takes longer because it needs to translate 'attrname

If you look at the the StackOverflow in my sibling comment to yours, running 'obj.attrname' on a namedtuple takes longer because it needs to translate 'attrname' to an integer index and then run (e.g.) 'obj[0]'. Outside of that, I'm not sure.