The last place I worked at had pretty similar build times for one rust service. Right before I left we ended up finding some low hanging fruit to trim that down to 15-20, but that's still pretty gnarly.
Build times can pile up pretty quickly as systems grow over time. I have to say with that code base the big sin was some extreme macro misuse. It's still possible to see times like that without heavy macro usage though.
That was a native linux build on a fairly modern i7 laptop.
What kind of flour has sugar in it? Most flours are a mixture of starches and protein from grinding up a grain. Starches take more work to digest than sugars, so they don't spike blood sugar levels as quickly.
It's fast on Linux where containers are native.