The Netflix TechBlog

JUNE 14, 2023

We migrated Netflix’s mobile apps to GraphQL with zero downtime, which involved a total overhaul from the client to the API layer. Until recently, an internal API framework, Falcor , powered our mobile apps. The three strategies we will discuss today are AB Testing , Replay Testing, and Sticky Canaries.

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Traffic Latency Metrics Cache 357

The Netflix TechBlog

AUGUST 28, 2020

As the number of 4K titles in our catalog continues to grow and more devices support the premium features, we expect these video streams to have an increasing impact on our members and the network. As mobile devices continue to improve, they adopt premium features (other than 4K resolution) like 10-bit and HFR.

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Network Storage Innovation Mobile 336

Dynatrace

JULY 8, 2019

I’ve been speaking to customers over the last few months about our new cloud architecture for Synthetic testing locations and their confusion is clear. When we wanted to add a location, we had to ship hardware and get someone to install that hardware in a rack with power and network. Sound easy? Try doing that in India.

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Smashing Magazine

DECEMBER 15, 2021

Touch Design For Mobile Interfaces: Defining Mobile Devices (Excerpt). Touch Design For Mobile Interfaces: Defining Mobile Devices (Excerpt). Mobile phones are rapidly becoming touchscreens and touchscreen phones are increasingly all-touch, with the largest possible display area and fewer and fewer hardware buttons.

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Mobile Design Internet Internet 122

Speed Curve

JANUARY 27, 2025

Size matters, especially to mobile users who have limited and/or metered data. Mobile: Median page has grown by 7.5% in one year A few years ago, it seemed like mobile page growth had slowed down, but it once again appears to be on the upswing. When we talk about page size, we're referring to overall page weight and complexity.

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Mobile Best Practices Google Metrics 97

CSS Wizardry

OCTOBER 16, 2023

Compressing them over the network: Which compression algorithm, if any, will we use? In one test, I concatenated it all into one big file, and the other had the library split into 12 files. Read the complete test methodology. Compress The above tests were run with Brotli compression 2. It’s a balancing act for sure. ?

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Cache Latency Strategy Speed 348

The Netflix TechBlog

JANUARY 22, 2021

Continuing in this tradition, we are proud to announce that Netflix now streams Extended HE-AAC with MPEG-D DRC ( xHE-AAC ) to compatible Android Mobile devices (Android 9 and newer). For example, on a mobile device with small speakers, it is often desirable to use a higher output level, such as -16 dBFS, as shown in Figure 5.

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Programming Mobile Testing Network 275

Testsigma

JANUARY 29, 2021

As per April 2019 data of Statistica[1], the global mobile population accounted for 4 billion unique users. That’s not all, the global mobile traffic is expected to increase sevenfold between 2017 and 2022. The daily media consumption on mobile devices has grown by 504 percent since 2011[2]. Mobile-first indexing.

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Website Mobile Testing Strategy 98

The Netflix TechBlog

AUGUST 10, 2020

Given the global nature of the service and Netflix’s commitment to creating a service that members enjoy, it is not surprising that we support a wide variety of streaming devices, from set-top-boxes and mobile devices to smart TVs. It is, thus, imperative that we are sensible in the use of the network and of the bandwidth we require.

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Dynatrace

APRIL 26, 2022

DEM provides an outside-in approach to user monitoring that measures user experience (UX) in real time to ensure applications and services are available, functional, and well-performing across all channels of the digital experience, including web, mobile, and IoT. One of the key advantages of DEM is its versatility. Endpoint monitoring (EM).

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Monitoring Social Media IoT Metrics 246

Testsigma

APRIL 23, 2021

It’s 2021 and we now have a mobile app for everything. Whether it’s social media, shopping, productivity or fitness, there’s a visible surge in the number of mobile apps and their users. So, there’s a solid reason why mobile app testing is a crucial step in any app development process. 91% iOS users. .

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Testing Tools Mobile Testing Open Source 86

Adrian Cockcroft

JANUARY 27, 2025

In part 3 I mentioned that I had developed some phone based apps while at eBay Research Labs in 2006, and I had also become involved in the Homebrew Mobile Phone Club , where a bunch of people got together in their spare time to try and build a phone that would be programmable by anyone. I built two more iOS apps that worked with Netflix.

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C++ Mobile Hardware Java 88

Testsigma

FEBRUARY 3, 2021

Today we are using mobile phones for social media, shopping, banking, movies, online meetings, emails, and whatnot. Can we have a single day in our life without a mobile phone today? Mobiles have different models, screen resolutions, operating systems, network types, hardware configurations, etc. Functional Testing.

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Mobile Testing Hardware C++ 82

The Netflix TechBlog

NOVEMBER 29, 2023

A vital aspect of such development is subjective testing with HDR encodes in order to generate training data. The pandemic, however, posed unique challenges in conducting a conventional in-lab subjective test with HDR encodes. A/B testing also allows us to get a read on the improvement in quality of experience (QoE).

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Open Source Software Engineering Internet Internet 260

Testsigma

MAY 3, 2021

billion in number and has become the part and parcel of our lives; the mobile phone. Mobile applications are taking the world by storm. 2021 alone is seeing 693 billion USD in revenue from mobile apps. The frequent mobile app updates are living evidence of this claim. A mobile device is a different story though.

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Mobile Testing Operating System Hardware 77

Smashing Magazine

JUNE 26, 2019

What Web Designers Can Do To Speed Up Mobile Websites. What Web Designers Can Do To Speed Up Mobile Websites. What I didn’t know before writing it was that her agency was struggling to optimize their mobile websites for speed. She understood how important mobile page speeds were to the user experience and, by proxy, SEO.

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Website Speed Mobile Design 111

Smashing Magazine

NOVEMBER 5, 2024

There are even many ways we can configure Lighthouse to measure performance in simulated situations, such as slow internet connection speeds or creating separate reports for mobile and desktop. What Lighthouse provides is more like “on-demand” testing that’s immediately available. And it’s fast. I emphasized the important part.

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Website Speed Google Metrics 100

Testsigma

DECEMBER 4, 2020

Every mobile application, irrespective of its category, has a common goal of creating an impeccable user experience. To ensure quality, mobile app testing is essential. In this blog, we will discuss a step-by-step mobile app testing checklist. This is where cross-platform testing comes into the picture.

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Mobile Testing Operating System Storage 65

Testsigma

JANUARY 22, 2021

In 2019, the worldwide sales of mobile devices were 1524 million units. This trend shows us how mobile devices have become a part and parcel of our lives. The growing mobile sales pressure has resulted in the growing mobile applications day after day. Variety of Mobile Applications. Long List of Operating Systems.

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Mobile Testing Energy Operating System 74

Dynatrace

AUGUST 5, 2022

The concept is like text messaging — a feature most mobile phone users understand. Without it, sending an email over a long distance would require the immediate availability of every node on the routing network to forward each message. A message queue enables the smooth flow of information to make complex systems work.

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Monitoring Programming Serverless Speed 246

Dynatrace

AUGUST 5, 2022

The concept is like text messaging — a feature most mobile phone users understand. Without it, sending an email over a long distance would require the immediate availability of every node on the routing network to forward each message. A message queue enables the smooth flow of information to make complex systems work.

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Monitoring Programming Serverless Speed 246

Dynatrace

MAY 8, 2023

DevOps aims to move applications more quickly into production by releasing new builds frequently — often several times per day — and incorporating constant feedback and testing, both during development and after software is deployed. But when and how does DevOps monitoring fit into the process?

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Dynatrace

NOVEMBER 15, 2021

A log is a detailed, timestamped record of an event generated by an operating system, computing environment, application, server, or network device. Anything connected to a network that generates a log of activity is a candidate for log monitoring and analysis. Use cases for log monitoring and log analytics.

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Analytics Monitoring DevOps Artificial Intelligence 264

Dynatrace

FEBRUARY 25, 2020

Common properties associated with each request have long enabled flexible filtering and analysis; for example, you could evaluate performance and errors associated only with mobile Safari users in South America. Technical: production vs. canary release, or A/B testing. Location: their country and city. Pin your results.

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Analytics Metrics Servers Best Practices 286

The Netflix TechBlog

NOVEMBER 9, 2021

In February 2020, Netflix started streaming AV1 to the Android mobile app. We were very pleased to see that AV1 streaming improved members’ viewing experience, particularly under challenging network conditions. Therefore, multiple A/B tests were created to compare AV1 with each of the applicable codec formats.

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Media Open Source Software Engineering Efficiency 246

The Morning Paper

JANUARY 30, 2020

Seamless offloading of web app computations from mobile device to edge clouds via HTML5 web worker migration , Jeong et al., This paper caught my eye for its combination of an intriguing idea (opportunistic offload of computation from mobile devices to the edge) and the elegance of the way the web worker interface supports this use case.

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Mobile Cloud Latency Games 104

Testsigma

FEBRUARY 19, 2021

The world isn’t new to the mobile-first approach. Call it convenience or anything else — people are consuming content on their mobile phones more than their desktops and this will only increase in the near future. According to Statista , at least 50% of global online traffic is driven by mobile users. What Is Mobile Web Testing?

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Mobile Testing Website Speed 65

Dean Hume

JULY 30, 2018

Without fail, there is this spot along the line where my network connection drops from a clear 4G signal to a 2G signal at best. It’s crazy to believe that around 45% of mobile connections occur over 2G worldwide , with 75% of of connections occur on either 2G or 3G ! This is where the Network Information API aims to change things.

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Network Speed Google Mobile 78

The Netflix TechBlog

SEPTEMBER 8, 2020

Migration Testing Infrastructure Our monolith had been around for many years and hadn’t been created with functional and unit testing in mind, so those were independently bolted on by each UI team. For the migration, testing was a first-class citizen. Replay Testing Enter replay testing.

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Latency Cache Java Traffic 241

Smashing Magazine

DECEMBER 14, 2021

Modifying Headers In HTTP(s) Requests In UI Automation Testing. Modifying Headers In HTTP(s) Requests In UI Automation Testing. That was when I first got to witness the power of network headers. Therefore I decided to write this piece to throw some light on the ways to modify headers in automated testing. Nafees Nehar.

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Testing Network Website Google 117

The Netflix TechBlog

NOVEMBER 2, 2020

Failure can occur due to a myriad of reasons: misbehaving clients that trigger a retry storm, an under-scaled service in the backend, a bad deployment, a network blip, or issues with the cloud provider. Let’s dig into how we accomplished this.

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Traffic Metrics Infrastructure Architecture 261

Dynatrace

APRIL 21, 2022

Using a data-driven approach to size Azure resources, Dynatrace OneAgent captures host metrics out-of-the-box to assess CPU, memory, and network utilization on a VM host. Too many fine-grained services leading to network and communication overhead. Too much data requested from a database. Missing caching layers.

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Azure Monitoring Virtualization Metrics 246

The Netflix TechBlog

JANUARY 11, 2022

Here we describe the role of Experimentation and A/B testing within the larger Data Science and Engineering organization at Netflix, including how our platform investments support running tests at scale while enabling innovation. What more can we learn from this test, to inform the next one?”

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Innovation Metrics Engineering Testing 245

Testsigma

AUGUST 12, 2021

From making them more user-friendly to crafting a mobile app-like experience, we’ve swiftly moved to the era of progressive web apps. As per Divante’s Top 30 Progressive Web Apps report , progressive web apps have at least a 36% higher conversion rate than native mobile apps. The Importance of Testing Web Applications.

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Testing Testing Tools Mobile Cloud 102

Testlodge

NOVEMBER 12, 2021

Various testing activities take place throughout the software development lifecycle, including compatibility testing, which is a non-functional testing technique. Compatibility testing should be performed under all possible scenarios to prevent bug spillover in the production environment. Types of Compatibility Testing.

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Testing Hardware Operating System Mobile 78

Testsigma

DECEMBER 28, 2020

But the question is, how to perform such exhaustive testing? Nowadays, to perform responsive checks, there are amazing testing tools, which ensures that your web applications are optimized for all the devices. In this article, we will run you through a curated selection of 7 premium tools for performing responsiveness testing.

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Design Testing Website Testing Tools 88

Testsigma

APRIL 13, 2022

Websites devoting their spaces to sections especially to download their mobile apps denotes how important mobile applications are for businesses. hours, is being spent on mobile applications. People spent USD $170 billion through mobile applications only in 2021. Security related scenarios in mobile testing.

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Mobile Social Media Testing Media 52