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?”

Innovation 243

Innovation Metrics Engineering Testing 243

Dynatrace

JUNE 28, 2019

As a full stack monitoring platform, Dynatrace collects a huge number of metrics for each OneAgent monitored host in your environment. Depending on the types of technologies you’re running on your individual hosts, the average number of metrics is about 500 per computational node. Our API-first design promotes automation.

Metrics 102

Metrics Efficiency Monitoring Azure 102

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. ?

Cache 291

Cache Latency Strategy Speed 291

The Netflix TechBlog

NOVEMBER 9, 2021

We were very pleased to see that AV1 streaming improved members’ viewing experience, particularly under challenging network conditions. To achieve this goal, the Encoding Technologies team made the following design decisions about AV1 encoding recipes: We always encode at the highest available source resolution and frame rate.

Media 246

Media Open Source Efficiency Software Engineering 246

Dynatrace

APRIL 26, 2022

Fast, consistent application delivery creates a positive user experience that can ultimately drive customer loyalty and improve business metrics like conversion rate and user retention. With DEM solutions, organizations can operate over on-premise network infrastructure or private or public cloud SaaS or IaaS offerings.

Monitoring 209

Monitoring Social Media IoT Metrics 209

Dynatrace

SEPTEMBER 13, 2023

This is a set of best practices and guidelines that help you design and operate reliable, secure, efficient, cost-effective, and sustainable systems in the cloud. If so, test against the response time objective under the same Site Reliability Guardian. If both objectives pass, you have achieved your cost reduction on CPU size.

AWS 252

AWS Efficiency Azure Cloud 252

Dynatrace

SEPTEMBER 22, 2022

Automating tasks throughout the SDLC helps software development and operations teams collaborate while continuously improving how they design, build, test, deploy, release, and monitor software applications. Defect escape rate is the rate of issues and bugs that escape testing and arise after a software application is in production.

DevOps 193

DevOps Innovation Speed Monitoring 193

Dynatrace

APRIL 21, 2022

Most monitoring tools for migrations, development, and operations focus on collecting and aggregating the three pillars of observability— metrics, traces, and logs. The Azure Well-Architected Framework is a set of guiding tenets organizations can use to evaluate architecture and implement designs that will scale over time. Reliability.

Azure 193

Azure Monitoring Virtualization Metrics 193

Smashing Magazine

AUGUST 9, 2022

It can be measured based on real data from users visiting your sites ( field metric ) or in a lab environment ( lab metric ). In fact, several user-centric metrics are used to quantify web vitals. While most of the tools covered below only rely on field metrics, others use a mix of both field and lab metrics.

Performance 130

Performance Benchmarking Website Metrics 130

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).

Open Source 252

Open Source Software Engineering Internet Internet 252

Dynatrace

JUNE 27, 2023

Logs complement metrics and enable automation Cloud practitioners agree that observability, security, and automation go hand in hand. Logs complement out-of-the-box metrics and enable automated actions for responding to availability, security, and other service events.

AWS 204

AWS Cloud Lambda Analytics 204

The Netflix TechBlog

AUGUST 30, 2021

By Benson Ma , Alok Ahuja Introduction At Netflix, hundreds of different device types, from streaming sticks to smart TVs, are tested every day through automation to ensure that new software releases continue to deliver the quality of the Netflix experience that our customers enjoy. In this blog post, we will focus on the latter feature set.

Latency 213

Latency Traffic Transportation Hardware 213

The Netflix TechBlog

JANUARY 24, 2022

Technically, “performance” metrics are those relating to the responsiveness or latency of the app, including start up time. At Netflix the term “performance” usually encompasses both performance metrics (in the strict meaning) and memory metrics, and that’s how we’re using the term here. What are the Performance Tests?

Performance 199

Performance Metrics Performance Testing Testing 199

The Netflix TechBlog

SEPTEMBER 8, 2020

To prepare ourselves for a big change in the tech stack of our endpoint, we decided to track metrics around the time taken to respond to queries. After some consultation with our backend teams, we determined the most effective way to group these metrics were by UI screen. For the migration, testing was a first-class citizen.

Latency 233

Latency Cache Java Traffic 233

CSS Wizardry

MAY 19, 2020

It’s widely accepted that self-hosted fonts are the fastest option: same origin means reduced network negotiation, predictable URLs mean we can preload , self-hosted means we can set our own cache-control. I ran the same suite of tests against the harry.is font-display: swap; For this test, I added the &display=swap back in.

Google 364

Google Media Latency Metrics 364

Testsigma

APRIL 13, 2022

Therefore, as a developer and a tester, it becomes a highly responsible job to test these mobile applications and deliver the best quality. However, we understand that if you are in this profession, you probably know all the basic test cases, scenarios and the holes where bugs can be found. Security related scenarios in mobile testing.

Mobile 52

Mobile Social Media Testing Media 52

The Morning Paper

SEPTEMBER 22, 2019

The secret sharer: evaluating and testing unintended memorization in neural networks Carlini et al., In evaluating our exposure metric, we find unintended memorization to be both commonplace and hard to prevent. USENIX Security Symposium 2019. So clearly it doesn’t need to memorise training examples.

Network 55

Network Testing Strategy Google 55

Dynatrace

AUGUST 11, 2022

This enables teams to quickly develop and test key functions without the headaches typically associated with in-house infrastructure management. Infrastructure as a service (IaaS) handles compute, storage, and network resources. Increased testing complexity. In-depth, AI-driven metrics can help to manage this simplicity.

Development 256

Development Serverless Best Practices Lambda 256

Dynatrace

SEPTEMBER 23, 2021

To function effectively, containers need to be able to communicate with each other and with network services. If containers are run with privileged flags, or if they receive details about host processes, they can easily become points of compromise for corporate networks. Source code tests. Network scanners.

Open Source 255

Open Source Benchmarking Best Practices Network 255

The Netflix TechBlog

NOVEMBER 24, 2023

Our creative team helps make this happen by designing promotional artwork that best represents each title featured on our platform. In the past, we have attempted to design A/B tests where we investigate one aspect of artwork at a time, often within one particular genre.

Tuning 201

Tuning Design Testing Engineering 201

The Netflix TechBlog

APRIL 29, 2019

Open Connect Open Connect is Netflix’s content delivery network (CDN). video streaming) takes place in the Open Connect network. Various software systems are needed to design, build, and operate this CDN infrastructure, and a significant number of them are written in Python. are you logged in?

Open Source 279

Open Source Network Infrastructure Big Data 279

The Morning Paper

JUNE 18, 2019

Nines are not enough: meaningful metrics for clouds Mogul & Wilkes, HotOS’19. ” These are SLOs that inform a customer’s application design, and failure to meet them may result in invalidated design assumptions — which doesn’t generally turn out well! Analogous to ‘power analysis’ in statistics).

Metrics 79

Metrics Cloud Google Network 79

Speed Curve

DECEMBER 10, 2017

Network metrics have been around for decades, but rendering metrics are newer. These are a few of the rendering metrics that currently exist. A brief history of performance metrics. Metrics quantify behavior. Metrics quantify behavior. Gaps in today's performance metrics. Speed Index.

Metrics 68

Metrics Website Speed Monitoring 68

Apica

DECEMBER 12, 2022

In our previous post, we established user journeys as the essential goal of software testing efforts. If you were on a desert island and forced to bring only one service level objective of a successful application, you would absolutely want to keep tracking user journeys, leaving the rest of the metrics behind. Let’s move past it.

Testing 52

Testing DevOps Monitoring Media 52

CSS Wizardry

NOVEMBER 3, 2020

Any time you run a test with WebPageTest, you’ll get this table of different milestones and metrics. Note the bottom row shows me the Standard Deviation of the tests’ results. Higher variance means a less stable metric across pages. With my pen and paper, I’ll make a note of investigating these specifically in my testing.

Speed 292

Speed Ecommerce Metrics Analytics 292

Smashing Magazine

MARCH 2, 2021

The State Of Mobile And Why Mobile Web Testing Matters. The State Of Mobile And Why Mobile Web Testing Matters. And to ensure the quality of a product, we always need to test — on a number of devices, and in a number of conditions. What’s a representative device to test on in 2021? Driving Business Metrics.

Mobile 134

Mobile Testing Website Benchmarking 134

CSS Wizardry

MARCH 28, 2022

This genuinely surprises me, because LCP is the simplest metric to improve. The metrics above don’t matter in and of themselves, but it’s going to help your LCP if you can get them as low as possible. To that end, waterfalls in all Chrome versions look identical, and networking/scheduling behaviour remains unchanged.

Virtualization 330

Virtualization Google Metrics Testing 330

Smashing Magazine

JUNE 10, 2021

Waterfaller: A Tool Focusing On Network Waterfalls. Contrary to Lighthouse or WebPage Test, Waterfaller focuses on one thing alone — issues in the network waterfall. Waterfaller focuses on issues in the network waterfall and provides recommendations for improvement. I discovered Waterfaller just recently.

Cache 106

Cache Website Best Practices Network 106

Testsigma

JANUARY 22, 2021

In this post, we will analyze these challenges of mobile app testing and how we can manage them. Each one of them has its own set of challenges and testing methods. While performing the mobile app testing, we need to take care of specific challenges for each of them. This will be the crux of this post.

Mobile 74

Mobile Testing Energy Operating System 74

Testsigma

AUGUST 24, 2020

Continuous Testing is the process of testing at all stages of software development – one after the another- without any human intervention. Continuous Testing is key to faster delivery of Agile products to the market. But the path to achieving Continuous Testing has its own challenges, most common of which are mentioned below.

Testing 69

Testing Open Source Scalability Latency 69

Dynatrace

JULY 6, 2022

Organizations that have achieved SRE maturity have a better handle on the state of their infrastructure, the ability to tie reliability metrics more tightly to business objectives, and the means to ensure a consistent and responsive customer experience. Design, implement, and tune effective SLOs.

Best Practices 193

Best Practices Open Source Tuning Infrastructure 193

The Netflix TechBlog

DECEMBER 11, 2020

The schema registry also integrates with our CI/CD systems like Spinnaker to automatically setup cloud networking for DGSs. Our goal was to design a GraphQL schema that was reflective of the domain itself, not the database model. Embracing a collaborative schema design approach was essential to achieving this goal.

Architecture 249

Architecture Best Practices Engineering Open Source 249

Smashing Magazine

NOVEMBER 22, 2021

It’s one thing to identify bottlenecks and implement optimizations for a specific website or a few similar websites, and quite another when dealing with many millions of websites, having such a wide variety of functionality, and an almost total freedom of design. Better tooling and metrics standardization. Jump to table of contents ?.

Website 126

Website Performance Google Media 126

Smashing Magazine

DECEMBER 7, 2023

If you’re reading this before March 2024 and fire up your favorite performance monitoring tool, you’re going to to get a Core Web Vitals report like this one pulled from PageSpeed Insights: ( Large preview ) You’re likely used to seeing most of these metrics. INP will officially replace FID when it becomes an official Core Web Vital metric.

Traffic 95

Traffic Metrics Google Monitoring 95

HammerDB

APRIL 19, 2023

Therefore, before we attempt to measure our database performance, we should know the system or cloud instance to be tested in detail. As database performance is heavily influenced by the performance of storage, network, memory, and processors, we must understand the upper limit of these key components. 4.22 %usr 38.40 0.42 %sys 9.52

Performance 54

Performance Benchmarking Cache Storage 54

Smashing Magazine

JUNE 1, 2022

You’ve spent months putting together a great website design, crowd-pleasing content, and a business plan to bring it all together. You’ve focused on making the web design responsive to ensure that the widest audience of visitors can access your content. You’ve agonized over design patterns and usability.

Website 131

Website Design Network Best Practices 131

Jos

JUNE 2, 2018

You will work hard on implementing features, collaborating with other teams (eg adding scripts for analytics, ads, retargeting, A/B test), setting up CI/CD, ensuring security, and making sure the project is usable and pleasant to the eye. And don’t forget about covering your back with tests.

Performance 237

Performance Speed Google Media 237