calendar.perfplanet.comWeb Performance Calendar » 2019

-- Web Performance Calendar The speed geek's favorite time of the year 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2019 31st Dec 2019 How to Optimize Page Load Times: A Different Slant on the Frustration Index by Neil Gunther I didn’t have anything planned for the Web Performance Calendar this year. That all changed after I read Tim Vereecke’s interesting proposal about a “Frustration Index” on Day 17. His post got my attention, as a performance analyst, because some things looked familiar to me, while other things confused me. Eventually, it all became a […] 31st Dec 2019 How to develop a practical transport protocol by Lohith Bellad At Cloudflare, we develop protocols at multiple layers of the network stack. Earlier we focused on HTTP 1.1, HTTP 2.0, TLS 1.3 protocols. Now, we are working on QUIC and HTTP/3, which is still in IETF draft, but gaining a lot of interest recently. Cloudflare also had UDP based transport protocol for mobile apps from […] 31st Dec 2019 Accelerating UDP packet transmission for QUIC by Alessandro Ghedini QUIC, the new Internet transport protocol designed to accelerate HTTP traffic, is delivered on top of UDP datagrams, to ease deployment and avoid interference from network appliances that drop packets from unknown protocols. This also allows QUIC implementations to live in user-space, so that, for example, browsers will be able to implement new protocol features […] 31st Dec 2019 Prototyping optimizations with Cloudflare Workers and WebPageTest by Andrew Galloni Have you ever wanted to quickly test a new performance idea, or see if the latest performance wisdom is beneficial to your site? As web performance appears to be a stochastic process, it is really important to be able to iterate quickly and review the effects of different experiments. The challenge is to be able […] 24th Dec 2019 Answering big questions with RUM data by Gilles Dubuc At the Wikimedia Foundation, we collect RUM data on Wikipedia and sister sites on a sampled pageview basis. This data, collected from various browser APIs like NavigationTiming is then stored on our self-hosted Hadoop cluster. At a smaller scale, a single database instance could be more than enough to achieve the same thing. You might […] 23rd Dec 2019 Case Study: React partial SSR with SFCC by Lyubomir Angelov This case study shows one way to implement partial Server-Side Rendering (SSR) and achive performance gains without big investments in middleware for cloud-based platforms. Cloud CMSs: quick background All cloud CMSs, such as Salesforce Commerce Cloud (SFCC) and Magento, have their pros and cons. In those CMSs, we have lots of restrictions, but the major […] 22nd Dec 2019 Native Image Lazy Loading in Chrome Is Way Too Eager by Aaron Peters I recently redesigned my personal site and the first version was very lean. As I started adding content to pages and writing new blog posts, it made sense to implement image lazy-loading to improve performance. There are many JS-based solutions for image lazy-loading but I did not want to invest time in finding the best […] 21st Dec 2019 Measuring Long Tasks and First Input Delay by Peter Hedenskog Me and the rest of the performance team of Wikimedia share a dream: A JavaScript free version of Wikipedia for readers. But at the moment we ship a lot of JavaScript to every user. We ship it asynchronously but we ship a lot! Wikipedia loves JavaScript! We have a long history and a lot of […] 20th Dec 2019 Bundling JavaScript for Performance: Best Practices by David Calhoun We’re about to enter into a new decade – 2020 and beyond, so what a good time to re-evaluate our best practices of yesteryear to see if they still hold up. Sometimes the best practices of yesterday become the antipatterns of today… I’ll be looking at three approaches with bundling a simple React.js “hello world” […] 19th Dec 2019 Sampling RUM: When and why it can be a great option by Cliff Crocker I confess, I’m not a statistician. While I pride myself on the ‘A’ I received in my college statistics class, admittedly it was on a pretty steep curve. That said, I’ve been looking at performance data for many years and have found myself on both sides of the debate about whether or not the practice […] 18th Dec 2019 Eco Worriers: Saving the Planet, One Unoptimized Website at a Time by Robin Osborne Performance Optimization is Great Sure, optimising performance for increasing profit is great. It’s great for improving the experience for your end users too. No doubt you can navigate DevTools like a champ, and you know your progressive jpeg from your interlaced png. But what about saving the planet? You heard me right, buddy. You can […] 17th Dec 2019 FRUSTRATIONindex – mind the gap by Tim Vereecke FRUSTRATIONindex – mind the gap FRUSTRATIONindex, a new KPI which will change how we look at web performance in 2020. This easy to consume index quantifies frustration loading web pages: It is a meaningful KPI for both business and IT It quickly identifies frustration hotspots FRUSTRATIONindex looks at the gap between metrics instead of looking […] 16th Dec 2019 Request collapsing: the hidden magic that invisibly speeds up the web by Andrew Betts The basic premise of a content delivery network (CDN) is straightforward enough. We (the CDN provider) become the public face of your website, and with thousands of servers all over the world, end users will connect to a server close to them. If we have the page they want, we give it to them right […] 15th Dec 2019 Fiddler AutoResponder by Robert Boedigheimer Fiddler is a great free web troubleshooting tool that has been available on Microsoft Windows since 2003 with a new cross-platform version called Fiddler Everywhere currently in beta. Fiddler functions by acting as a proxy between the web client and the web server, which gives it the ability to not only monitor traffic but also […] 14th Dec 2019 Magic Numbers or Psychological Thresholds? by Alex Podelko I would like to return to the last year Performance Calendar post Magic numbers by Gilles Dubuc. When I read it, I had an urge to reply – but then realized that too many subtle topics are involved and the reply would be too long for a comment. So replying by a full post this […] 13th Dec 2019 Developing the Largest Contentful Paint Metric by Annie Sullivan Background I work on Chrome’s Speed Metrics team. We develop Chrome’s top level performance metrics — the metrics that measure the performance of the web’s most key user experiences. For years, we’ve been working towards a metric that captures when the main content of the page has displayed, both in the lab and in real-user […] 12th Dec 2019 Visualizing Speed Without Real Data by Sergey Chernyshev Many of us are facing the challenge of promoting the idea of speed of user experience within our organizations and crave any support data to help “sell” it to business stakeholders, product managers and engineers. Real User Measurement (RUM) is a great tool to capture speed from actual users in the wild, measure their engagement […] 11th Dec 2019 Lessons learned from developing my Real User Monitoring system – Basic RUM by Tsvetan Stoychev When I blog I always write something that has practical value for readers but I also like to share a short story that relates to it. This is my intention in this article as well. This post will be a bit of story-telling and will give examples of how I do things on a lower […] 10th Dec 2019 Self-hosting third-party resources: the good, the bad and the ugly by Anthony Barré Over the past years, more and more frontend optimizers had offered a way to self-host or proxy third-party resources. Akamai offers a way to specify a specific behavior for self-crafted URLs, Cloudflare has its Edge Worker and Fasterize can rewrite URLs on a page to reference third-party resources via the primary domain. If you know […] 9th Dec 2019 The unseen performance costs of modern CSS-in-JS libraries in React apps by Aggelos Arvanita...