As of mid 2016 they baked --reset-cache into the bundle step. By turning that off subsequent builds take around 30 seconds. No specific bugs referenced but description indicates cache is invalid "if the babel config changes". https://github.com/facebook/react-native/commit/bb0653661637e907c13c4352d657974c5daf1513

Has anyone had luck getting reagent 0.8 working w/ react native?

There's an issue related to this. https://github.com/drapanjanas/re-natal/issues/128#issuecomment-357536912

(Haven't tried it myself.)

Ahh, I'll try changing my target and see if that fixes it. Thanks!