Link tags: performance



My Challenge to the Web Performance Community — Philip Walton

I’ve noticed a trend in recent years—a trend that I’ve admittedly been part of myself—where performance-minded developers will rebuild a site and then post a screenshot of their Lighthouse score on social media to show off how fast it is.

Mea culpa! I should post my CrUX reports too.

But I’m going to respectfully decline Phil’s advice to use any of the RUM analytics providers he recommends that require me to put another script element on my site. One third-party script is one third-party script too many.

Have Single-Page Apps Ruined the Web? | Transitional Apps with Rich Harris, NYTimes - YouTube

This is a terrific and nuanced talk that packs a lot into less than twenty minutes.

I heartily concur with Rich’s assessment that most websites aren’t apps or documents but something in between. It’s a continuum. And I really like Rich’s proposed approach: transitional web apps.

(The secret sauce in transitional web apps is progressive enhancement.)

Have Single-Page Apps Ruined the Web? | Transitional Apps with Rich Harris, NYTimes

🧠 ct.css – Let’s take a look inside your `head`

I love a good bookmarklet, and Harry has made a very good bookmarklet indeed.

Drag ct.css to your browser bar and then press it whenever you’re on a site you want to check for optimising what’s in the head element.

Why We Create Progressive Web Apps: A Conversation with Jeremy Keith

This is a really nice write-up by Sydney of the chat we had on her podcast.

Decoded: The When, Why, and Why Not of Progressive Web Apps

I really enjoyed talking to Sydney Lai about progressive web apps, resilient web design, and all my other hobby horses.

Alas, there’s no transcript and I can’t find a direct link to the RSS feed or the individual audio file on the podcast website so it’s not huffduffable.

HTTP/3 From A To Z: Core Concepts (Part 1) — Smashing Magazine

I spend most of my time in the application layers—HTML, CSS, and JavaScript—so I fascinating to dive below the surface and learn about the upcoming HTTP/3. Sounds like it’s really more of a change to how things have always worked with the TCP protocol, still chugging away since it was created by Bob Kahn and Vint Cerf.

Making Reasonable Use of Computer Resources

The paradox of performance:

This era of incredibly fast hardware is also the era of programs that take tens of seconds to start from an SSD or NVMe disk; of bloated web applications that take many seconds to show a simple list, even on a broadband connection; of programs that process data at a thousandth of the speed we should expect. Software is laggy and sluggish — and the situation shows little signs of improvement. Why is that?

Because we prioritise the developer experience over the user experience, that’s why:

Although our job is ostensibly to create programs that let users do stuff with their computers, we place a greater emphasis on the development process and dev-oriented concerns than on the final user product.

We would do well to heed Craig’s observations on Fast Software, the Best Software.

Robin Rendle ・ The web is too damn complex

The modern web wouldn’t be possible without big ol’ JavaScript frameworks, but—but—much of the web today is held back because of these frameworks. There’s a lot of folks out there that think that every website must use their framework of choice even when it’s not necessary. And although those frameworks solve a great number of problems, they introduce a substantial number of trade-offs; performance issues you have to deal with, complex build processes you have to learn, and endless dependency updates that can introduce bugs.

Introducing Astro: Ship Less JavaScript

In Astro, you compose your website using UI components from your favorite JavaScript web framework (React, Svelte, Vue, etc). Astro renders your entire site to static HTML during the build. The result is a fully static website with all JavaScript removed from the final page.


When a component needs some JavaScript, Astro only loads that one component (and any dependencies). The rest of your site continues to exist as static, lightweight HTML.

That’s the way to do it! Make the default what’s best for users (unlike most JavaScript frameworks that prioritise developer convenience at the expense of the end user experience).

This is a tagline I can get behind:

Ship Less JavaScript

Real-world CSS vs. CSS-in-JS performance comparison - Tomas Pustelnik’s personal website

CSS-in-JS can have a noticeable impact on your webpage. Mainly for low-end devices and regions with a slower internet connection or more expensive data. So maybe we should think better about what and how we use our tooling. Great developer experience shouldn’t come at the expense of the user experience.

Google AMP is dead! AMP pages no longer get preferential treatment in Google search

I don’t know if AMP is quite dead yet, but it feels like it would be a mercy to press a pillow down on its face.

Google’s stated intention was to rank sites that load faster but they ended up ranking sites that use AMP instead. And the largest advertising company in the world dictating how websites can be built is not a way to a healthier and more open web.

Pixelhop new website walk through

A case study with equal emphasis on animation and performance.

Performance-testing the Google I/O site -

Modern web development:

Imagine you went to a restaurant, took a seat, and 20 minutes later you still haven’t been given a menu. You ask where it is, and you’re told “oh, we’re currently cooking you everything you might possibly ask for. Then we’ll give you the menu, you’ll pick something, and we’ll be able to give you it instantly, because it’ll all be ready”.

Single page apps, ladies and gentlemen.

Global performance insights for your site | Lighthouse Metrics

I hadn’t come across this before—run Lighthouse tests on your pages from six different locations around the world at once.

Reflecting on My Own Experience Using the Web to Get the Vaccine - Jim Nielsen’s Blog

I click the link. The page loads fast. I navigate the surprisingly sparse yet clear form inputs. And complete the whole thing in less than thirty seconds.

Oh, how I wish this experience weren’t remarkable!

Simple forms with clear labels. Little to no branding being shoved down my throat. No array of colors, big logos, or overly-customized UI components.

Au revoir, mon AMPmour? — Ethan Marcotte

I’ll say again: deprioritizing AMP in favor of Core Web Vitals is a very good thing. But it’s worth noting that Google’s taken its proprietary document format, and swapped it out for a proprietary set of performance statistics that has even less external oversight.

The End of AMP – lafoo – ramblings about the online world

Google provided a distinct advantage to sites using AMP – priority placement on the world’s largest traffic source – Google search. I’ve had the pleasure of working with more than twenty thousand publishers in the five years since AMP’s launch, and I don’t believe I’ve ever heard a single reason that a publisher uses AMP other than to obtain this priority placement. Let me package that up for you – Google, the most dominant search engine globally – used that dominant market position to encourage publishers to adopt technology so that Google could store and serve publisher’s content on Google’s domain. How is that legal? Well, I’m not a lawyer, but it possibly isn’t.

The death of AMP can’t come soon enough.

If you’re currently using AMP, you’ll be able to get rid of that monstrosity in May, and if you aren’t, you’ll now be competing for search positions previously unavailable to you. For publishers, it is a win-win.

Now THAT’S What I Call Service Worker! – A List Apart

This is terrific! Jeremy shows how you can implement a fairly straightforward service worker for performance gains, but then really kicks it up a notch with a recipe for turning a regular website into a speedy single page app without framework bloat.

The Performance Inequality Gap, 2021 - Infrequently Noted

Developers, particularly in Silicon Valley firms, are definitionally wealthy and enfranchised by world-historical standards. Like upper classes of yore, comfort (“DX”) comes with courtiers happy to declare how important comfort must surely be. It’s bunk, or at least most of it is.

As frontenders, our task is to make services that work well for all, not just the wealthy. If improvements in our tools or our comfort actually deliver improvements in that direction, so much the better. But we must never forget that measurable improvement for users is the yardstick.