Re: Well done, SpaceX ...
The Me262 jet could reach over 850 km/h
And the Me 163 Komet (rocket-powered interceptor) could reach about 1000 km/h - still not Mach 1. And, by all accounts, pretty lethal to the pilots during training (a bit like the Yamaha RD250/350/500 motorbikes - they had such an insane power curve that inexperienced riders often crashed when they hit the power curve for the first time. The RD250 was once described as "expressly designed to power-wheelie learners[1] into roadside furniture"..)
[1] Those were the days when having a provisional license allowed you to ride a 250cc bike - or much, much bigger if fitted with a side-car. Which lead to the development of 'sidecars' which were effectively just a tea-tray with a wheel and clever springs that allowed the bike to still lean properly.. The 250cc allowance (and sidecar allowance) was removed shortly after.