Watch my first run done on Windows 10, then my second run on Windows 7. For the first run, I start moving on Jo-Ad 1 at around 16 seconds after starting the run, while on the second run I start moving at 13 seconds.

You might be thinking "surely this would be due to hardware differences in the rigs used for both runs, right?". Well, I'll tell you that both runs were performed using the exact same PC, since I have it setup with a win7/win10 dual boot, which means the differences are indeed coming solely from the difference in OS.

I'm actually not entirely sure if the gameplay sections are actually running faster too, but at first glance that'd seem to be the same speed.

Anyways, do with this information what you will. :)

I was wondering.. is the -mpeg command allowed? It should lower times by a lot of seconds

@Francyz0 According to this post apparently it was allowed, but I haven't seen any runs actually use it, so I don't know.