Ionic2 takes upto 30 sec to load app

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Using ionic2 and angular2 we build almost 13-14 features/module.

Used 8-10 third party npm depenedencies and ionic plugins.

Packge.json

 {
      "name": "Yugma",
      "author": "NxtLife Team",
      "homepage": "http://www.nxtlifetechnologies.com/",
      "private": true,
      "scripts": {
        "build": "ionic-app-scripts build",
        "watch": "ionic-app-scripts watch",
        "serve:before": "watch",
        "emulate:before": "build",
        "deploy:before": "build",
        "build:before": "build",
        "run:before": "build",
        "postinstall": "typings install"
      },
      "dependencies": {
        "@angular/common": "2.2.1",
        "@angular/compiler": "2.2.1",
        "@angular/compiler-cli": "2.2.1",
        "@angular/core": "2.2.1",
        "@angular/forms": "2.2.1",
        "@angular/http": "2.2.1",
        "@angular/platform-browser": "2.2.1",
        "@angular/platform-browser-dynamic": "2.2.1",
        "@angular/platform-server": "2.2.1",
        "@ionic-native/camera": "^3.4.4",
        "@ionic-native/core": "^3.1.0",
        "@ionic-native/file": "^3.4.4",
        "@ionic-native/file-chooser": "^3.4.4",
        "@ionic-native/transfer": "^3.4.4",
        "angular2-moment": "^1.0.0-beta.rc.1",
        "intl": "^1.2.5",
        "ionic-angular": "2.2.0",
        "ionic-gallery-modal": "^0.1.1",
        "ionic-native": "^2.2.3",
        "ionic2-calendar": "^0.2.4",
        "ionic2-rating": "0.0.10",
        "ionicons": "3.0.0",
        "nxtlife-ionic2-rating": "^1.0.3",
        "rxjs": "5.0.0-beta.12",
        "sw-toolbox": "3.4.0",
        "typings": "1.3.1",
        "underscore": "^1.8.3",
        "zone.js": "0.6.26"
      },
      "devDependencies": {
        "@ionic/app-scripts": "^1.1.4",
        "typescript": "2.0.6"
      },
      "cordovaPlugins": [
        "cordova-plugin-whitelist",
        "cordova-plugin-statusbar",
        "cordova-plugin-device",
        "cordova-plugin-console",
        "ionic-plugin-keyboard",
        "cordova-plugin-splashscreen"
      ],
      "cordovaPlatforms": [],
      "description": "NxtLifeYugma2: An Ionic project"
    }

Ionic info

Cordova CLI: 6.5.0
Ionic Framework Version: 2.2.0
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.3.7
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Linux 4.9
Node Version: v6.10.3
Xcode version: Not installed

Too much frustrated to solve this issue with ionic2. Guys most welcome for any suggestion or advice.

2 Answers
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