long loading times before I can preview on Android

Building apk time for android app is acceptable but it takes about 10 to 15minutes -maybe even more! - to build and preview on mobile, I’m using a core i7 windows 10 laptop with 6GB of Ram so I don’t think the system is slow, has anybody encountered such a looong buildinig time, It mostly stays on on statge one which is libProjectName.so .