组件react-native-router-flux中的tabbar 在安卓机器上反应速度非常慢，

已有issue提问: https://github.com/aksonov/react-native-router-flux/issues/199

Extremely slow on android#199

看似原因：

For future reference make sure to not have console.log anywhere in the code,whether it is your redux middleware or in the debug for this library

实则：

turn off "JS Dev Mode （已解决问题,只需一步）

You will want to make sure that youturn off"JS Dev Mode," or else it
will run painfully slow on device.

After running "react-native run-android" you should "shake" your device
to bring up the menu. Select "Dev Settings" then uncheck "JS Dev Mode."

After that run "react-native run-android" again and it should be more performant,at least I hope for you :)