I’ve tried this, it did not work in my case. I’m still getting slow load times (20 - 30 seconds) on my iPhone 5. I build it with --prod flag.
Cordova CLI: 6.3.1
Ionic Framework Version: 3.0.1
Ionic CLI Version: 2.2.2
Ionic App Lib Version: 2.2.1
Ionic App Scripts Version: 1.3.0
ios-deploy version: 1.9.0
ios-sim version: 5.0.8
OS: macOS Sierra
Node Version: v6.9.4
Xcode version: Xcode 8.3.1 Build version 8E1000a
What’s odd is that I have an older version of basically the same app and it boots up in 2-3 seconds on the same device. I didn’t have this problem until I upgraded to Ionic v3 and a newer version of the cli.
Update:
For whatever reason - passing the --prod flag in the cli does not work. ex: ionic build ios --prod
But making an edit in the package.json helped: