I'm already well aware of this. I'm asking why the OP thinks otherwise. It's not outright impossible to make it affect performance [1] but I'm trying to see wha

I'm already well aware of this. I'm asking why the OP thinks otherwise. It's not outright impossible to make it affect performance [1] but I'm trying to see what the concern is. [1] Like by taking the approach that results in a cast, e.g. here: https://news.ycombinator.com/item?id=20493263 https://news.ycombinator.com/item?id=20493263