Tag Archives: app performance

NordVPN boosted the speed of its login user flow by 60% using Baseline Profiles

Posted by Ben Weiss, Senior Developer Relations Engineer

NordVPN is a virtual private network (VPN) app that protects users while they’re browsing the web by providing them a more secure and private connection. As a network utility, NordVPN’s users deserve a responsive UI, allowing them to set up their protections at a moment’s notice. That's why NordVPN developers recently integrated Baseline Profiles, a profile-guided optimization that helps Android developers improve an app's startup and runtime performance using ahead-of-time compilation.

Improving performance with Baseline profiles

As part of its product roadmap for 2023, the NordVPN team wanted to boost the application’s performance. Before implementing Baseline Profiles, NordVPN’s startup times on Android devices didn’t meet the team’s standards, prompting them to examine new ways to make the app run better.

After exploring ways to improve its runtime performance and streamline the login process for users, NordVPN developers identified an opportunity to make the app faster using Baseline Profiles. Baseline Profiles lets the Android Runtime (ART) know which code paths to optimize through Ahead-of-Time (AOT) compilation before an app launches, boosting speed, stability, and overall responsiveness during startup, when navigating through the app, and while viewing content.

“App speed and stability are essential for a better user experience, so we’re always looking for new ways to improve NordVPN’s performance,” said Himanshu Singh, senior Android engineer at NordVPN. “We wanted to speed up the app’s load time and make launch and navigation faster than ever.”

By applying Baseline Profiles, NordVPN improved its launch speed by an average of 24%. Using tools like Android Vitals, the NordVPN team measured that it had reduced the application’s cold start time from 4.3 seconds to 3.2 seconds, the warm start time from 2.7 seconds to 1.8 seconds, and the hot start time from 1 second to 0.7 seconds.

After implementation, NordVPN developers' also noticed that Baseline Profiles made it faster for users to login to the app, improving the user login flow. The login flow is measured from when a user starts an app to when a user is logged into it. Using the Macrobenchmark library to monitor the improvements, the team observed that the NordVPN app runs its login flow 60% faster than before.

A black quote card featuring a headshot if Ernestas on the right with text in white that reads “The introduction of Baseline Profiles helped us achieve outstanding results, elevating our application’s speed with minimal effort.” — Ernestas Balčiūnas, engineering lead at NordVPN

Integrating and testing Baseline Profiles is easy

The ease of implementing Baseline Profiles impressed NordVPN developers. The available resources, in-depth documentation, and codelabs from Android allowed them to enhance the app’s UX without having to write an extensive amount of code themselves.

Using the Macrobenchmark library, NordVPN developers quickly generated Baseline Profiles for the application. To do this, they used a Gradle managed device, which enabled them to create new profiles without a physical device. Using a Gradle Managed Device also allowed NordVPN developers to create fresh profiles for each app release build on their Continuous Integration platform. Looking forward, NordVPN developers plan to migrate Baseline Profile generation to the official Gradle plugin, which will further automate profile generation.

NordVPN developers combined development workflows to create an integration pipeline, allowing them to test the app under various conditions. Then, the Macrobenchmark library ran Baseline generation tests, pushing the latest Baseline Profiles into the code base.

A black Quote card featuring droid on the right side and a green half oval overlay on the left with white text that reads, 'Applying Baseline Profiles in the NordVPN application led to a 29% improvement to overall in-app speed.'

A quick boost to app quality

After integrating Baseline Profiles into NordVPN’s code, its developers saw immediate speed improvements. The engineering team assessed the app’s overall speed after finishing the project and found that, beyond improving the app’s launch times, applying Baseline Profiles led to a 29% improvement to overall in-app speed.

"We’re constantly working to improve app quality, and Baseline Profiles integration has proven to be one of the most successful steps we’ve taken,” said Šarūnas Rimša, product owner at NordVPN. “We’re helping users access the services they’re entitled to faster. What's not to like?"

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Learn how you can improve your app’s performance using Baseline Profiles.

Working Towards Android App Excellence

Posted by Jacob Lehrbaum Director of Developer Relations, Android

illustration of freckled hand over mobile phone with graphs

Great app experiences are great for business. In fact, nearly three-quarters of Android app users who leave a 5 star review on Google Play mention the quality of their experience with the app1; its speed, design, and usability. At Google, we want to help all developers achieve app excellence, and in turn help you drive user acquisition, retention, and monetization.

So what is “app excellence”? This may sound aspirational, but it is within reach for many apps. It starts with a laser focus on the user, and more specifically, with intuitive user experiences that get people to the main functionality of your app as quickly as possible — but that is just the beginning. Excellent apps are consistent across all of their screens and experiences. They perform well, no matter the device used. App excellence is achievable when all of the stakeholders who influence your app are invested in the experience of using your app.

One of the blockers that gets in the way of app excellence is shared or unclear accountability. Some of the primary measures of app quality, such as crashes and load times, are often seen as the responsibility of one group in the company, such as the engineering team. However, when we talk to best-in-class organizations2 about how they achieve app quality, it is clear that taking a cross-functional approach is key, with engineering, design, product, and business teams working toward a common goal.

So what are some internal best practices behind app excellence?

Make app quality a cross-organizational focus — not just an engineering concern

It’s a way easier conversation for me at the business end because I can say “these competitors’ apps are faster than ours; we need to reduce our load time down from 5 seconds to 4 seconds”.
Software engineer, x-platform app

App excellence helps drive business performance. New features are great, but if they slow down app start-up times or take up too much device space, people will eventually use your app less often or even delete it. Engineers who have built a company-wide focus on quality have often done so by quantifying the impact of quality issues on business performance, through:

  • Case studies showing the impact of responsiveness, APK size, start-up time, and memory usage on business KPIs. Here you can find practical case studies showcasing how developers such as Headspace and Duolingo achieved app excellence.
  • Benchmarking against competitor apps. Check out peer benchmarks and other metrics on the Google Play Console.

Organize teams around features and/or app user journey stages

Companies that organize teams around features — or stages in the user journey — are more likely to deliver consistent experiences across each operating system they support, bring new apps or features to market faster, and deliver a better app experience for all their customers. These teams are often cross-functional groups that span engineering, marketing, ux, and product — and are responsible for the success of a feature or user journey stage3 across all devices and platforms. In addition to better experiences and feature parity, this structure enables alignment of goals across functional areas while reducing silos, and it also helps teams hyper-focus on addressing specific objectives.

Feature organized team graph

Squads focused on business objectives heighten focus on the user.

Use the same devices your customers use

If a majority of your users are on a specific type of device, you can build empathy for their experience if you use the same phone, tablet or smart watch as your primary device. This is especially relevant for senior leadership in your organization who make decisions that impact the day-to-day experience of millions of users. For example, Duolingo has built this into their company DNA. Every Duolingo employee — including their CEO — either uses exclusively or has access to an entry level Android device to reflect a significant portion of their user base.

A user-centric approach to quality and app excellence is essential to business growth. If you are interested in learning how to achieve app excellence, read our case studies with practical tips, and sign up to attend our App Excellence Summit by visiting the Android app excellence webpage.

In subsequent blog posts, we will dig deep into two drivers of excellent app experiences: app performance and how it is linked to user behavior, and creating seamless user experiences across devices. Sign up to the Android developer newsletter here to be notified of the next installment, and get news and insights from the Android team.

Notes

  1. Internal Google Play data, 2021. ↩

  2. Google App Quality Research, 2021 ↩

  3. The series of steps each user takes as they interact with your app is referred to as the “user journey.” Examples of user journey stages include installs, onboarding, engagement, and retention ↩