The Netflix TechBlog

FEBRUARY 13, 2024

These observations are from a particular type of A/B test that Netflix runs called a software canary or regression-driven experiment. An example data stream for an A/B test where each observation represents play-delay for the control (left) and treatment (right). Such changes should not be ignored by our testing procedure.

Testing 239

Testing Software Software Metrics 239

Dynatrace

OCTOBER 16, 2023

Synthetic testing simulates real-user behaviors within an application or service to pinpoint potential problems. Here’s a look at why this testing matters, how it works, and what companies need to get the most from this approach. What is synthetic testing? RUM, meanwhile, requires actual users.

Testing 217

Testing Best Practices Testing Tools Monitoring 217

The Netflix TechBlog

SEPTEMBER 22, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , and Colin McFarland This is the second post in a multi-part series on how Netflix uses A/B tests to inform decisions and continuously innovate on our products. An A/B test is a simple controlled experiment. Some metrics will be specific to the given hypothesis.

Testing 245

Testing Entertainment Metrics Social Media 245

DZone

JUNE 9, 2021

Whenever we need to do performance testing, mostly it is the APIs that come to mind. Testing the performance of an application by putting load on APIs or on servers and checking out various metrics or parameters falls under server-side performance testing.

Testing 332

Testing Performance Testing Metrics Servers 332

Dynatrace

AUGUST 2, 2021

Metrics matter. But without complex analytics to make sense of them in context, metrics are often too raw to be useful on their own. To achieve relevant insights, raw metrics typically need to be processed through filtering, aggregation, or arithmetic operations. Examples of metric calculations. Dynatrace news.

Metrics 246

Metrics Analytics Google Code 246

Dynatrace

OCTOBER 26, 2020

Dynatrace has recently enhanced its Metrics APIs, allowing everyone to send any type of metric with any set of data dimension to Davis, Dynatrace’s AI engine. Christian Inzko , Performance Engineer out of our Klagenfurt Lab, is running a lot of performance tests to validate performance and scalability of our Dynatrace clusters.

Innovation 159

Innovation Metrics Hardware Games 159

DZone

AUGUST 29, 2021

In this blog post, we’ll examine one such case where we use the Sentry JavaScript SDK to instrument Jest (which runs our frontend test suite) and how we addressed the issues that we found. We have high-level metrics for how well (or not) our CI is performing.

Testing 330

Testing Performance Testing Metrics Systems 330

DZone

OCTOBER 9, 2023

Not another figure to look at when analyzing performance test results! which we have to review for our report; why add a new metric to the list? Actually, the Coefficient of Variation (CoV) stands out as a valuable metric to prove that your application will perform reliably under various conditions.

Software Performance 152

Software Performance Performance Testing Software Software 152

Dynatrace

JANUARY 5, 2022

Credits on content go to him and the work he has been doing around performance & resiliency testing automation. Our Application Performance Management (APM) and load test team at T-Systems MMS helps our customers reduce the risk of failed releases. Automation : Single load test executions can be repeated and tracked.

Testing 226

Testing Open Source Metrics Infrastructure 226

DZone

JULY 21, 2022

Development of any software is a tedious and long process, and it undergoes a series of quality and performance tests before its release and use. As the technological world evolves, so do user expectations for handling applications; it is essential to test the performance of the applications before deploying them on a large scale.

Software 246

Software Software Development Metrics 246

Dynatrace

JUNE 3, 2022

So, whenever your end users’ digital experience is bogged down by a problem, whether it’s the result of a synthetic test (browser and synthetic), mobile app monitoring, or web monitoring, your teams need to see the most pertinent information about the impact and the root cause at a glance.

Metrics 231

Metrics Mobile IoT Monitoring 231

DZone

MAY 31, 2022

A website needs to be constantly tested and optimized to be in line with Google's web and SEO guidelines. Core Web Vitals is a key performance metric that analyzes the website's performance by investigating the data and provides a strategic platform to scale up the website's user experience. What Is Web Performance Testing?

Performance Testing 244

Performance Testing Testing Performance Website Performance 244

DZone

APRIL 6, 2020

You have consistently written unit tests and you have a line coverage of, let us say, 80% and all of your tests pass. But then you change your code and still all of your tests pass although you have changed code which is covered by your unit tests. But what is the value of the metric itself? Pretty good, isn’t it?

Testing 220

Testing Metrics Code 220

The Netflix TechBlog

OCTOBER 26, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , and Colin McFarland This is the fourth post in a multi-part series on how Netflix uses A/B tests to inform decisions and continuously innovate on our products. Have a look at Part 1 (Decision Making at Netflix), Part 2 (What is an A/B Test?), Need to catch up?

Testing 202

Testing Latency Metrics Innovation 202

The Netflix TechBlog

JUNE 14, 2023

The three strategies we will discuss today are AB Testing , Replay Testing, and Sticky Canaries. To launch Phase 1 safely, we used AB Testing. To launch Phase 2 safely, we used Replay Testing and Sticky Canaries. We knew we could test the same query with the same inputs and consistently expect the same results.

Traffic 353

Traffic Latency Cache Metrics 353

DZone

AUGUST 21, 2021

The responsibility of developers keeps growing, and as mobile apps get more complex, new tools for mobile performance monitoring and testing are being born. Speed, UX, availability, and frequency of updates are increasingly important with mobile apps. But this process usually takes a couple of weeks.

Mobile 246

Mobile Metrics Performance Speed 246

Dynatrace

JULY 21, 2020

Metrics are an essential functionality provided by the Dynatrace Software Intelligence Platform. Dynatrace OneAgent and ActiveGate extensions provide you with a multitude of metrics. We also empower you with the ability to ingest your own custom metrics and leverage those metrics using a variety of Dynatrace features.

Metrics 147

Metrics Azure Monitoring Infrastructure 147

Abstracta

FEBRUARY 24, 2020

Making sense of the average, standard deviation and percentiles in performance testing reports There are certain performance testing metrics that are essential to understand properly in order to. The post 3 Key Performance Testing Metrics Every Tester Should Know appeared first on Abstracta Software Testing Services.

Performance Testing 89

Performance Testing Metrics Testing Performance 89

The Netflix TechBlog

DECEMBER 7, 2020

VMAF is a video quality metric that Netflix jointly developed with a number of university collaborators and open-sourced on Github. One aspect that differentiates VMAF from other traditional metrics such as PSNR or SSIM, is that VMAF is able to predict more consistently across spatial resolutions, across shots, and across genres (for example.

Metrics 154

Metrics Open Source Tuning Speed 154

Dynatrace

DECEMBER 15, 2020

OpenTelemetry metrics are useful for augmenting the fully automatic observability that can be achieved with Dynatrace OneAgent. OpenTelemetry metrics add domain specific data such as business KPIs and license relevant consumption details. It has undergone security analysis and testing in accordance with AWS requirements.

AWS 182

AWS Metrics Analytics Government 182

Dynatrace

MAY 7, 2024

Fluent Bit is a telemetry agent designed to receive data (logs, traces, and metrics), process or modify it, and export it to a destination. Fluent Bit and Fluentd were created for the same purpose: collecting and processing logs, traces, and metrics. Observability: Elevating Logs, Metrics, and Traces! What is Fluent Bit?

Best Practices 252

Best Practices IoT Metrics Storage 252

DZone

APRIL 12, 2023

The basic answer is that it’s a malfunction that slipped past the whole squad and any test scripts in place, ending up in production and potentially affecting users. Defect Leakage is a metric used to determine the performance of QA testing , precisely how many defects are overlooked during QA testing.

Testing 130

Testing Software Software Metrics 130

DZone

FEBRUARY 25, 2021

QA performance metrics are essential for eliminating inefficient strategies and improving internal processes. Your QA performance metrics process should identify if goals are being met as and analyze resources to make sure they are producing to their maximum capacity.

Metrics 144

Metrics Performance Strategy Engineering 144

The Netflix TechBlog

OCTOBER 7, 2021

Martin Tingley with Wenjing Zheng , Simon Ejdemyr , Stephanie Lane , and Colin McFarland This is the third post in a multi-part series on how Netflix uses A/B tests to inform decisions and continuously innovate on our products. Have a look at Part 1 (Decision Making at Netflix) and Part 2 (What is an A/B Test?). Need to catch up?

Testing 226

Testing Games Metrics Innovation 226

Dynatrace

FEBRUARY 21, 2024

Automating quality gates is ideal, as it minimizes manually checking and validating key metrics throughout the SDLC. By actively monitoring metrics such as error rate, success rate, and CPU load, quality gates instill confidence in teams during software releases. Several tools can be used to collect metrics in load/performance testing.

Speed 216

Speed Software Software Latency 216

DZone

MAY 15, 2020

Now that you’ve deployed your code, it’s time to monitor it, collect data, and analyze your metrics. You’ve just released your new app into the wild, live in production. Your job is done, right? Without application performance monitoring in place, you can’t accurately determine how well things are going. Are people using your app?

Metrics 246

Metrics Performance Development Monitoring 246

The Netflix TechBlog

JUNE 13, 2023

Our previous blog post presented replay traffic testing — a crucial instrument in our toolkit that allows us to implement these transformations with precision and reliability. By tracking metrics only at the level of service being updated, we might miss capturing deviations in broader end-to-end system functionality.

Traffic 279

Traffic Metrics Systems Strategy 279

The Netflix TechBlog

MAY 4, 2023

The second phase involves migrating the traffic over to the new systems in a manner that mitigates the risk of incidents while continually monitoring and confirming that we are meeting crucial metrics tracked at multiple levels. Replay Solution The replay traffic testing solution comprises two essential components.

Traffic 339

Traffic Latency Tuning Systems 339

Smashing Magazine

FEBRUARY 24, 2022

How To Benchmark And Improve Web Vitals With Real User Metrics. How To Benchmark And Improve Web Vitals With Real User Metrics. Different products will have different benchmarks and two apps may perform differently against the same metrics, but still rank quite similarly to our subjective “good” and “bad” verdicts.

Benchmarking 117

Benchmarking Metrics Best Practices Monitoring 117

DZone

JUNE 7, 2023

A/B testing involves comparing two or more variations of a webpage or user experience to determine which one performs better in achieving predefined goals. A/B testing plays a significant role in improving conversion rates, user engagement, and overall website performance. Websites are not static entities; they evolve over time.

Website 130

Website Development Testing Strategy 130

Dynatrace

APRIL 30, 2021

As organizations develop more applications and microservices, they are discovering they also need to run more performance tests in the same amount of time or less to meet service-level objectives (SLOs) that fulfill service-level agreements (SLAs). How can organizations address this process bottleneck and run more tests in less time?

Engineering 208

Engineering Testing Performance Performance Testing 208

Dynatrace

FEBRUARY 28, 2024

In the previous blog post of this series , we discussed the crucial role of Dynatrace as an orchestrator that steps in to stop the testing phase in case of any errors. It involves carefully examining the test results from the previous testing phase. Configure an action for the Site Reliability Guardian in the workflow.

DevOps 212

DevOps Metrics Engineering Analytics 212

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. New metric identifiers and structure.

Metrics 103

Metrics Efficiency Monitoring Azure 103

The Netflix TechBlog

NOVEMBER 27, 2023

Our contributions kicked off with a concept that is crucial to our understanding of A/B tests: surrogates! This means we can reliably run shorter tests with confidence without needing to wait months for results!

Code 216

Code Games Metrics Innovation 216

Tasktop

JULY 22, 2021

That’s why I’m so excited to see Flow Metrics added to the latest SAFe iteration. outlines three core metrics : Outcomes : Are your solutions meeting the needs of customers and business? To support this goal, we have refactored, refined and extended our approach to metrics into three measurement domains, Outcomes , Flow and Competency.

Metrics 98

Metrics DevOps Efficiency Benchmarking 98

Speed Curve

FEBRUARY 28, 2024

Image by Freepik On-demand testing has sparked a lot of discussion here at SpeedCurve over the past year. You've always had the ability to manually trigger a round of tests – based on the scheduled tests in your settings – using the 'Test Now' button. What are the two types of tests within SpeedCurve?

Testing 73

Testing Benchmarking Performance Testing Metrics 73

HammerDB

MARCH 23, 2023

the Transaction Counter and CPU Metrics have been updated on both Windows and Linux to use a package called tkpath enabling more advanced graphic features using the GPU where available. This gives the transaction counter, and CPU metrics, a more updated look and feel, whilst maintaining the previous lightweight impact of the graphical code.

Metrics 70

Metrics Availability Code Testing 70