Slow opening ionic 3 project

[ionitron-bot]

Original issue by @Ayoubaddi on 2018-03-24T16:41:43Z

i finish my application and i build it with this command ionic build android --release , and i use a splash screen , and is work fine in google chrome browser
but in android device is take 180 second to open before show the splash screen
i try to use ionic build android --prod , but is show me this error https://i.imgur.com/DpQY5ir.png
can anyone help me ?
Thank for the time