This is the "modern" one with the egregiously bloated UI (including a loading screen!) and telemetry... but funny that it's using the same calculation code. Of course they still managed to screw it up somehow: https://news.ycombinator.com/item?id=17670644
In one of the old Win2k source leaks the code can be found for the far more efficient "classic" one.
In one of the old Win2k source leaks the code can be found for the far more efficient "classic" one.
Also, title needs (2019). There are some other HN articles from around that time discussing it: https://news.ycombinator.com/item?id=19321217