O'Reilly

MARCH 25, 2025

The best practices in those fields have always centered around rigorous evaluation cycles. Business value : Once we have a rubric for evaluating our systems, how do we tie our macro-level business value metrics to our micro-level LLM evaluations? At its core, this case study demonstrates evaluation-driven development in action.

Systems 69

Systems Development Tuning Monitoring 69

Testsigma

MARCH 24, 2021

Such case studies uplift the importance of a better user interface and hence the importance of the user interface testing, or UI testing. In this post, we shall see some of the best practices and tips on android UI testing to help you gain confidence and approach testing an application in the correct way.

Best Practices 52

Best Practices Testing Mobile Games 52

Speed Curve

JUNE 24, 2019

A while back, our friends at Shopify published this great case study , showing how they optimized one of their newer themes from the ground up – and how they worked to keep it fast. Keep reading to learn how you can apply these best practices to your own site and give your pages a speed boost.

Performance 85

Performance Best Practices Metrics Mobile 85

Speed Curve

JUNE 15, 2020

New JavaScript CPU metrics. Track CPU metrics in your first and third parties. For those three new metrics, you not only get them for the full page load, but you also get them split out by first-party or third-party attribution, so you know exactly where the responsibility for a janky page lies. Total Blocking Time.

Metrics 85

Metrics Best Practices Monitoring Google 85

Speed Curve

MAY 1, 2023

A performance budget is a threshold that you apply to the metrics you care about the most. A good performance budget chart, such as the one above, should show you: The metric you're tracking The threshold you've created for that metric When you exceed that threshold How long you stayed out of bounds When you returned to below the threshold 3.

Performance 98

Performance Metrics Media Google 98

Smashing Magazine

JUNE 1, 2022

Researchers and major companies have been publishing case studies for years , proving that slower page load experiences impact business metrics, including conversion rate, revenue, bounce rate, and more. Poor performance of third-party services can have other business impacts even if your website does not use advertising.

Website 138

Website Design Network Testing 138

Tasktop

MAY 13, 2020

No real best practices or case studies to guide us because the new market conditions are yet to be fully identified or understood. How to overlay Flow Metrics on top of Agile and DevOps initiatives to identify bottlenecks. What is the “Novel Economy”? The Novel Economy is unique in that it’s true to its definition.

Internet 86

Internet Internet Innovation DevOps 86

MachMetrics

SEPTEMBER 22, 2020

Let’s add in some metrics ( click here if you need a refresher on these ): Time to First Byte (TTFB): 0.47s First Contentful Paint: 0.7s Look again at the metrics above. Even better, we hope this case file shows you the best practices and potential fixes for your own e-commerce site. Total Blocking Time: 2.2s

Retail 82

Retail Speed Website Google 82

Smashing Magazine

AUGUST 15, 2023

So noticeable, in fact, that Core Web Vitals has a metric all about it called Largest Contentful Paint (LCP). This metric measures the time it takes, in seconds, to render the largest image or text block that is visible on the initial load. 400 pages , jam-packed with in-depth user research and best practices.

Media 77

Media Metrics Mobile Best Practices 77

Speed Curve

JANUARY 31, 2018

In this post, I'm going to share some proven tips and best practices to help you create a healthy, happy, celebratory performance culture. Over the years, I've learned that performance can be mapped to all of these metrics – and almost any other business metric you can think of. conversions. time on site.

Performance 40

Performance Metrics Traffic Monitoring 40

Smashing Magazine

AUGUST 3, 2023

Google’s Core Web Vitals is a set of performance metrics that site owners can use to evaluate performance and diagnose performance issues. These metrics provide a different perspective on user experience: Largest Contentful Paint (LCP) Measures the time it takes for the main content on a webpage to load. One of the key Next.js

Performance 78

Performance Cache Traffic Metrics 78

Speed Curve

DECEMBER 25, 2013

Recently Grigorik has been championing this approach and the Google Pagespeed Insight rules have been updated to reflect this best practice with recommendations on how to reduce the size of "above the fold" content. Case study: the new responsive Guardian site. Control and branch the loading of CSS and JS.

Performance 60

Performance Mobile Website Benchmarking 60

Smashing Magazine

MAY 9, 2022

400 pages , jam-packed with in-depth user research and best practices. Though, personally, I am glad they did since it was an interesting case study. When investigating the impact on your site look at all available metrics for any improvement. Jump to table of contents ?. Large preview ).

Cache 106

Cache Games Performance Website 106

Rigor

SEPTEMBER 3, 2019

Case studies abound. Review OWASP’s recommendations and best practices with your developers. Use a static analysis tool or a vulnerability scanner (available from all major vendors such as Qualys , Veracode , or Micro Focus ) to assess how well you are complying with security best practices.

Website 74

Website Cache Traffic Ecommerce 74

Speed Curve

JULY 8, 2024

A recent analysis of twenty leading websites found a surprising number of page speed optimizations that sites are not taking advantage of – to the detriment of their performance metrics, and more importantly, to the detriment of their users and ultimately their business. Only 3 out of 20 sites passed this audit.

Speed 139

Speed Cache Benchmarking Metrics 139

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 138

Performance Metrics Benchmarking Google 138

KeyCDN

AUGUST 29, 2019

While these metrics can be very helpful it is also important to keep this data in perspective. According to Google, the best practice for a website’s speed is to keep it under 3 seconds load time. As we can see from the graph below, this best practice is far from being met for sites based in the United States.

Google 103

Google Cache Speed Analytics 103

Speed Curve

JANUARY 7, 2020

Harry Roberts did an eye-opening talk called From Milliseconds to Millions , in which he shared practical wisdom gleaned from his experience as a performance consultant for some of the biggest sites in the world. MORE: Performance culture tips and best practices. Understand the latest performance metrics.

Performance 93

Performance Best Practices Metrics Monitoring 93

Smashing Magazine

JUNE 8, 2021

Which metrics should you focus on to improve the user experience? Twitter’s Image Pipeline (Case Study). +. This case study focuses on the different steps that Twitter has taken to load images faster while ensuring they are as impactful as intended. Optimize Images for Core Web Vitals. +. DRM-free, of course.

Media 124

Media Cache Google Best Practices 124

Smashing Magazine

APRIL 28, 2021

Which metrics should you focus on to improve the user experience? Twitter’s Image Pipeline (Case Study). +. This case study focuses on the different steps that Twitter has taken to load images faster while ensuring they are as impactful as intended. Optimize Images for Core Web Vitals. +. DRM-free, of course.

Media 105

Media Cache Google Best Practices 105

Smashing Magazine

MARCH 19, 2021

But we can’t really say just yet whether it had any impact on the business metrics — well, we’ll need to wait for a big book release to see that. We’ve also been reaching out to invite new authors and smart folks like you to work on interesting case studies from your ongoing projects. Green Scores in Lighthouse on Mobile.

Mobile 142

Mobile Design Cache Code 142

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. Getting Ready: Planning And Metrics. It will help you build up a company-tailored case study with real data. Table Of Contents.

Performance 145

Performance Cache Metrics Media 145

Smashing Magazine

JANUARY 7, 2019

Getting Ready: Planning And Metrics. Getting Ready: Planning And Metrics. You need a business stakeholder buy-in, and to get it, you need to establish a case study on how speed benefits metrics and Key Performance Indicators ( KPIs ) they care about. Table Of Contents. Setting Realistic Goals. Assets Optimizations.

Performance 111

Performance Cache Network Metrics 111

Smashing Magazine

JANUARY 6, 2020

Getting Ready: Planning And Metrics. Getting Ready: Planning And Metrics. You need a business stakeholder buy-in, and to get it, you need to establish a case study, or a proof of concept using the Performance API on how speed benefits metrics and Key Performance Indicators ( KPIs ) they care about. Quick Wins.

Performance 112

Performance Cache Servers Network 112