The Netflix TechBlog

OCTOBER 7, 2021

At Netflix, we have significant investments in ensuring new versions of our applications are well tested. However, Netflix is available for streaming on thousands of types of devices and it is powered by hundreds of micro-services which are deployed independently, making it extremely challenging to comprehensively test internally.

Metrics 197

Metrics Mobile Testing Strategy 197

Alex Podelko

SEPTEMBER 8, 2020

Some time ago Federico Toledo published Performance Testing with Open Source Tools- Busting The Myths. While Federico definitely has good points there, there is some truth in these myths too. I remember really liking the technical side of these tests. What load testing tools did you use? What is your business model?

Open Source 223

Open Source Performance Testing Testing Performance 223

Dynatrace

JULY 30, 2021

The first hands-on session is easy to accomplish the 5-minute success challenge, but things heat up in our second session as we walk attendees through either Codifying the SLOs in YAML or using a Dashboard-based definition approach. This is where the dashboard-based quality gate definition comes in. Hands-on 2: Codify your SLOs.

Cloud 214

Cloud DevOps Azure Virtualization 214

Dynatrace

JULY 16, 2021

We have seen users who joined our preview program “speed up their release validation by 90%”. Many of our users are performance engineers using Cloud Automation Quality Gates to automate the analysis of their performance and load tests – saving hours of analysis time for each test they run.

DevOps 246

DevOps Open Source Cloud Azure 246

Speed Curve

MARCH 11, 2024

After years of development and testing, Google has added Interaction to Next Paint (INP) to its trifecta of Core Web Vitals – the performance metrics that are a key ingredient in its search ranking algorithm. INP replaces First Input Delay (FID) as the Vitals responsiveness metric. This is what the INP metric assesses."

Mobile 81

Mobile Google Metrics Monitoring 81

The Netflix TechBlog

SEPTEMBER 10, 2019

Toby Mao , Sri Sri Perangur , Colin McFarland Another day, another custom script to analyze an A/B test. You can look at ABlaze (our centralized A/B testing platform) and take a quick look at how it’s performing. At any point a Netflix user is in many different A/B tests orchestrated through ABlaze. Not at Netflix.

Metrics 215

Metrics Architecture Infrastructure Innovation 215

Dynatrace

DECEMBER 9, 2020

To speed up release frequency, they’re investing in delivery-pipeline automation. The flip side of speeding up delivery, however, is that each software release comes with the risk of impacting your goals of availability, performance, or any business KPIs. Which metrics are relevant for your business, anyway?

Metrics 156

Metrics Engineering Google Monitoring 156

DZone

FEBRUARY 27, 2021

But these are definitely ruled out for enterprise applications due to the complexity in development, maintainability, need for object orientation, and interoperability. Considering all aspects and needs of current enterprise development, it is C++ and Java which outscore the other in terms of speed. You have one gold coin.

Java 207

Java C++ Benchmarking Programming 207

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

Dynatrace

DECEMBER 2, 2021

To get a better handle on this, let’s start with some definitions. These can include business metrics, such as conversion rates, uptime, and availability; service metrics, such as application performance; or technical metrics, such as dependencies to third-party services, underlying CPU, and the cost of running a service.

Metrics 200

Metrics Best Practices DevOps Infrastructure 200

Speed Curve

JULY 10, 2023

Demonstrating the impact of performance on your users – and on your business – is one of the best ways to get your company to care about the speed of your site. Setting up conversion tracking in SpeedCurve RUM is fairly simple and definitely worthwhile. This post covers: What is a conversion? Sometimes results vary by site.

Performance 52

Performance Metrics Traffic Speed 52

Dynatrace

MARCH 17, 2021

This increase in speed, alongside a more unified team utilizing a single source of truth to build trust, has enabled the business to benefit too; having the capability to adapt more dynamically to pricing changes, be more agile with new product offerings and follow the market more accurately and quicker than ever before.

DevOps 198

DevOps Media Metrics Technology 198

Speed Curve

MAY 1, 2023

If you've invested countless hours in speeding up your pages, but you're not using performance budgets to prevent regressions, you could be at risk of wasting all your efforts. A performance budget is a threshold that you apply to the metrics you care about the most. Which metrics should you start with?

Performance 98

Performance Metrics Media Google 98

Speed Curve

FEBRUARY 15, 2021

Web pages are unbelievably complex, and there are hundreds of different metrics available to track. A performance budget is a threshold that you apply to the metrics you care about the most. This is when you run into three important questions: Which metrics should you focus on? Which metrics should you focus on?

Performance 133

Performance Metrics Benchmarking Google 133

Dynatrace

MAY 28, 2020

Keptn uses SLO definitions to automatically configure Dynatrace or Prometheus alerting rules. After a new build gets deployed and automated tests executed, SLIs are evaluated against their SLOs and, depending on that result, a build is considered good (promoted) or bad (rolled back). “ This is what this blog is all about.

Engineering 198

Engineering Performance Metrics Best Practices 198

CSS - Tricks

JUNE 1, 2021

Testing is one of those things that you either get super excited about or kinda close your eyes and walk away. Whichever camp you fall into, I’m here to tell you that front-end testing is for everyone. In fact, there are many types of tests and perhaps that is where some of the initial fear or confusion comes from. Integration.

Testing 95

Testing Performance Testing Website Code 95

MachMetrics

DECEMBER 14, 2019

Similar to our article Average Page Load Times for 2018 , we’ll go over the averages for metrics and help you determine if your site is faster or slower than average. As you know, there are many metrics that determine a website’s page speed, and we can’t look at just one of them to determine how performant our site is.

Best Practices 105

Best Practices Speed Mobile Google 105

Speed Curve

MARCH 7, 2022

How does page bloat affect other metrics, such as Google's Core Web Vitals? Having said that, looking at data over the past ten years, it's safe to make the observation that pages are definitely trending bigger. You can see this by looking at the synthetic test result for Sears.com (again, available via our Industry Benchmarks ).

Mobile 145

Mobile Benchmarking Google Metrics 145

O'Reilly

OCTOBER 18, 2022

When that data is used to train an AI system, that system can replicate our bad behavior with speed and scale. By definition, new AI technology is less mature. While there are many interesting and useful benchmark datasets for testing bias in natural language processing, none provided these types of exhaustive demographic labels.

Artificial Intelligence 115

Artificial Intelligence Government Healthcare Metrics 115

Jos

JUNE 17, 2017

In a recent post about Chrome 60 Beta , Google announced the support of the Paint Timing API to get metrics on when your page starts rendering and when the user gets content that can be consumed (more info on the definition of the events below). Yet those metrics don’t tell us the whole picture about the rendering experience.

Google 130

Google Analytics Metrics Speed 130

Dean Hume

SEPTEMBER 21, 2016

Whilst web page load time is an important metric to measure, it doesn't tell the whole picture. As I started to learn more about web page performance, I started to experiment with webpagetest.org and discovered the different metrics that it uses. The total is your Speed Index score!" speedindex-test.

Speed 40

Speed Analytics Google Retail 40

Dean Hume

SEPTEMBER 21, 2016

Whilst web page load time is an important metric to measure, it doesn't tell the whole picture. As I started to learn more about web page performance, I started to experiment with webpagetest.org and discovered the different metrics that it uses. The total is your Speed Index score!" speedindex-test.

Speed 40

Speed Analytics Google Retail 40

Dean Hume

SEPTEMBER 21, 2016

Whilst web page load time is an important metric to measure, it doesn't tell the whole picture. As I started to learn more about web page performance, I started to experiment with webpagetest.org and discovered the different metrics that it uses. The total is your Speed Index score!" speedindex-test.

Speed 40

Speed Analytics Google Retail 40

Smashing Magazine

APRIL 19, 2021

Google has announced that from 1st May, they will start to consider “Page Experience” as part of Search ranking , as measured by a set of metrics called Core Web Vitals. The Core Web Vitals are a set of three metrics designed to measure the “core” experience of whether a website feels fast or slow to the users, and so gives a good experience.

Google 140

Google Metrics Mobile Analytics 140

Smashing Magazine

OCTOBER 24, 2023

Total Blocking Time One thing I know would be more helpful than a set of Core Web Vitals scores from Lighthouse is knowing the time it takes to go from the First Contentful Paint (FCP) to the Time to Interactive (TTI), a metric known as the Total Blocking Time (TBT). You can see that Lighthouse does indeed provide that metric.

Google 91

Google Analytics Traffic Metrics 91

Speed Curve

SEPTEMBER 25, 2018

This gives us a relatively unique opportunity to analyse and aggregate performance metrics to gain some interesting insights. In this post, I'm going to analyse some browser-based paint timing metrics: First Paint & First Contentful Paint (defined in the Paint Timing spec and implemented in Chromium). What are paint timing metrics?

Metrics 49

Metrics Performance Testing Testing Internet 49

MachMetrics

JUNE 30, 2021

Website performance & speed plays a major role in the success of an online business. Many people often confuse site speed with page speed grades of performance testing tools, which are actually calculated based on multiple factors of a page including its loading speed.

Cache 78

Cache Speed Google Website 78

Tasktop

AUGUST 18, 2022

Definition of value . Feedback speed . Delivery Metrics. Definition of value. For example, developers might have to wait for another team to provision a testing environment before they can test and complete a feature. . Feedback speed. Delivery team metrics. Team organization .

Software 52

Software Software Metrics Speed 52

Jos

JUNE 17, 2017

In a recent post about Chrome 60 Beta , Google announced the support of the Paint Timing API to get metrics on when your page starts rendering and when the user gets content that can be consumed (more info on the definition of the events below). Yet those metrics don’t tell us the whole picture about the rendering experience.

Google 100

Google Analytics Metrics Speed 100

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

Apica

NOVEMBER 15, 2019

With this shift in applications everywhere enterprises need to do their due diligence in performance testing complex modern applications at scale, often and at a lower cost to stay competitive. With this growth and added complexity, how are your legacy performance testing solutions keeping up?

Performance Testing 40

Performance Testing Testing Performance Games 40

Speed Curve

JULY 31, 2023

Google's Core Web Vitals are an attempt to help folks new to web performance focus on three key metrics. Since it's an unintuitive metric anyway and takes effort to understand, why not just turn it into a score out of 100? A synthetic test showing three session windows with the largest window of 0.71 used as the CLS score.

Google 52

Google Metrics Testing Performance 52

Speed Curve

DECEMBER 4, 2023

Earlier this year, when Google announced that Interaction to Next Paint (INP) will replace First Input Delay (FID) as the responsiveness metric in Core Web Vitals in *gulp* March of 2024, we had a lot to say about it. TLDR: FID doesn't correlate with real user behavior, so we don't endorse it as a meaningful metric.) for mobile.

Mobile 54

Mobile Performance Metrics Google 54

Smashing Magazine

JANUARY 11, 2021

LogRocket tracks key metrics, incl. Getting Ready: Planning And Metrics Performance culture, Core Web Vitals, performance profiles, CrUX, Lighthouse, FID, TTI, CLS, devices. Testing And Monitoring Auditing workflow, proxy browsers, 404 page, GDPR cookie consent prompts, performance diagnostics CSS, accessibility. Quick Wins.

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JUNE 2, 2021

Every front-end developer is chasing the same holy grail of performance: green scores in Google Page Speed. Real-life performance for your users and how the website “feels” when you’re using it should not be discounted, even if it costs you a point or two in Page Speed (otherwise, we would all just have a search bar and unstyled text).

Performance 116

Performance Cache Website Mobile 116

Percona

DECEMBER 14, 2022

I was pretty optimistic that I’d truly have impressive numbers to share but as it turns out, while there is a potential for significant advantage, a detailed testing regime of the CITUS columnar store extension should be carried out before implementing them into your own environment. speeds up scans, . The missing sizzle. drill-down.

Database 92

Database Analytics Storage Processing 92

CSS - Tricks

MARCH 16, 2020

Along with other general diagnostics and web performance metrics, a really useful feature of the report is that each of the key areas is aggregated into color-coded scores between 0-100. If not, then check your Node installation is working and you’re definitely in the correct project directory. Here’s what a full report looks like.

Google 82

Google Latency Website Metrics 82