Well (tens) thousands doubles vs BigDecimals (think of marketing data) and any operations over them is a massive difference.
The premature optimization is beyond uncalled for. Learning to use floating point type is something that most developers should do. No need for weasel words, either (annoying, counterintuitive).
The premature optimization is beyond uncalled for. Learning to use floating point type is something that most developers should do. No need for weasel words, either (annoying, counterintuitive).