Appveyor CI is super slow

[wheybags]

Muuuuch slower than travis, and I don't think it's just "lol windows is shit", I've had freeablo build in decent time on windows before.

Not sure why it's happening, would be nice to find out / fix it

[tilkinsc]

https://ci.appveyor.com/project/wheybags/freeablo/build/1.0.439/messages

[Predelnik]

With hunter cache hit: It's ~10 minutes on appveyor against ~5 minutes on travis
With cache miss: ~30 minutes on appveyor(it's that slow on my machine too btw) against ~10 minutes on travis
But it's really hard to tell from quick googling how much exactly their build environments differ. Technically try to use ninja instead of VS project on appveyor could be made at least to compare.

[tilkinsc]

With my pc I built it in ... an hour at least maybe 1:15. 3.2 dual core windows 7 mingw64 4gigs ddr3
Boost takes... 95% of the time or so.