Ionic deploy v5 app start up time doubled

I just updated ionic deploy to v5. It works but my app start up time has greatly increased. from 3-6 seconds to a minimum of about 12 seconds. I haven’t done anything but update the plugins and update my code to use the new methods.

my versions for ionic pro, cordova-plugin-ionic and cordova-plugin-webview are
@ionic/pro”: “^2.0.3”,
plugin name=“cordova-plugin-ionic” spec="^5.0.8"
plugin name=“cordova-plugin-ionic-webview” spec="^2.0.3"

has anyone else experienced this, and have you come up with any solutions?