Challenges with Performance in IONIC Mobile Applications

Currently, we are in the final stages of developing a high-profile mobile application for one of our clients using the IONIC framework. The application performs well when accessed through a Web/Mobile Browser. However, once it is ported into a mobile application using the framework commands, it begins to exhibit sluggish performance and frequently gets stuck, leading to a subpar user experience.

When creating the APK, we utilize the command "ionic run android" but encounter issues that prevent us from submitting the APK for testing. We are seeking assistance to resolve this problem and improve the speed of the application through possible configurations.

In addition, there are instances where an Ionic Loader has been incorporated on various pages within the app. Unfortunately, its functionality is inconsistent as it only appears sporadically, further contributing to the negative user experience.

javascriptandroidiosangularjsionic-framework

Answer №1

Which loading spinner are you currently implementing with Ionic? I found the existing options to be lacking and decided to create my own solution.

What specific version are you aiming for, and which version are you testing on a physical device?

Here are some tips to enhance performance:

  1. If your target is below 4.4 and APK size is not a concern, consider integrating the crosswalk runtime by using the command ionic browser add crosswalk. While this can improve performance, it will increase the size of the APK.

  2. Instead of using ionic run android, opt for ionic build android for better results.

  3. Minify JS and CSS, combine them, and remove debug information in your gulpfile.js. Implementing html2js on templates may also lead to slight performance enhancements.

  4. Be cautious with ng-repeat; prefer utilizing collection-repeat or use the track by feature if sticking with ng-repeat.

  5. Avoid using filters excessively as they can impact performance negatively. Use directives whenever feasible.

  6. Utilize deferred actions with $q to create an impression of speed.

  7. Sometimes traditional DOM manipulation without Angular can be more efficient for certain tasks.

  8. Opt for one-time binding where applicable. Using {{ ::thing }} sets the value once and maintains it, reducing watchers and enhancing performance.

  9. Avoid calling $scope.$apply() as it processes all components. Instead, utilize $scope.$digest() for processing only within the scope of its call.

  10. Try to minimize the number of $$watchers as much as possible!

  11. Include only necessary libraries to keep your bundle size minimum.

  12. Steer clear of jQuery usage (though this might be obvious).

Best of luck with your optimization efforts!

Answer №2

UPDATE: September 17, 2015

These days, Cordova's integration with Crosswalk is flawless and highly recommended for testing and building Android apps.

In addition to Darryn.ten's detailed answer, I would like to share a few more tips:

  • Crosswalk: This tool significantly improves performance in older Android versions without the built-in Chromium browser. If errors occur when installing Crosswalk using the Ionic CLI, try using Intel XDK for easy testing, debugging, and building with Crosswalk.
  • Be cautious of background images and gradients, as they can cause major performance issues. Removing them may improve scrolling and transitions.
  • Utilize hardware-based CSS with translate3d for smoother movement within the DOM.

Although hybrid apps still have room for improvement, we remain hopeful for progress in the future.

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