DEADScript: The Role Of JavaScript In Web Sustainability

Rate this content
Bookmark

In the web performance circles, we tend to closely watch paint times, blocking times, and so many more metric times, which all contribute to analyzing the user experience. In 2023, we have begun to pay more attention to metric tonnes. DEADScript is a presentation highlighting the resources we’re loading in modern development, and JavaScript’s unique role in this disquieting environmental dilemma.

Henri Helvetica
Henri Helvetica
21 min
05 Jun, 2023

Comments

Sign in or register to post your comment.

Video Summary and Transcription

This Talk discusses digital sustainability and the role of JavaScript in web sustainability. It highlights the impact of electricity carbon intensity and page weight on carbon footprints. The Talk also examines JavaScript's contribution to the carbon footprint on mobile devices and emphasizes the importance of reducing unnecessary requests. The introduction of the carbon control tool, which provides performance data and estimates carbon footprints, is also mentioned.

Available in Español

1. Introduction to Dead Script

Short description:

Good morning, DOM! I tend to talk about web performance and metrics at work. Today, I'm going to talk about the environment and sustainability, specifically digital sustainability with respect to JavaScript. Welcome to my talk, Dead Script, the role of JavaScript in web sustainability. This recording is on May 17, the anniversary of ECMA International.

Good morning, DOM! You know me, I like to greet the DOM each and every morning. But I'm also going to say good morning, Amsterdam, or should I call it GCE Europe West 4. That's what we call it at work, it's one of our zones. I thought that was kind of funny.

Anyhow, let me get right into it. I tend to talk about web performance a lot. It's a thing I do at work. It's the engineers that I talk to at work as well. And, you know, we'll cover things like, I don't know, Core Web Vitals, like that new vital that was announced like maybe three weeks ago or something like that. But I definitely do talk about metrics, because we're surrounded by metrics at work. So I'll talk about paint metrics. I'll talk about speed metrics. I'll also talk about timing metrics. But today I'm going to talk about metric tons. Huh? What could that be all about? Well, I'm going to talk about the environment. I'm going to talk about sustainability. And what do you think when you hear the words like environment and sustainability? What crosses your mind? Well, I'll be very frank and honest. My brother got a Tesla, and I'm a little jealous because it's really nice. So I mean, I've been thinking about this Ioniq 6, which is kind of iconic actually, by Hyundai. I love the shape. But you know what, let's get back to the matter at hand, which is sustainability. And specifically, we're going to talk about digital sustainability. And since this is the JS Nation conference, we're going to cover digital sustainability with respect to JavaScript.

So I'd like to welcome you to my talk, which I'm calling Dead Script, the role of JavaScript in web sustainability. Now, a little background. This is a recording on May 17, which is the anniversary of ECMA International, the body that was responsible for standardizing JavaScript. For those who might know, JavaScript was once called LiveScript for a hot minute. So I was like, Dead Script, LiveScript, I thought that was kind of interesting. Anyways, let's keep it moving. So my name is Henri.

2. Digital Sustainability and ICT

Short description:

You can find me on most socials under Henri Helvetica. I work at Catchpoint and talk about performance, especially Webpagetest. Digital sustainability is complicated, with many factors to consider. It relates to how electricity is generated and powers information and communication technologies (ICTs). ICTs use 7% of global electricity and are responsible for 4% of CO2 emissions worldwide. This exceeds the aviation industry and even some countries. We also need to discuss data centers, networks, and consumer devices, which are all part of ICT. Location is another important factor to consider.

You can find me on most socials under Henri Helvetica. I work at this amazing company called Catchpoint. And one of the things I do at Catchpoint is talk about performance, and certainly around this fantastic tool that we have, which is called Webpagetest, the standard and gold standard really of web performance testing. I'm from the greatest city on the planet, which is called Toronto in Canada. And I do a little bit of distance running. So I like to use the hashtag devs who run. So if you do run as well, feel free to use it.

All right, let's keep it moving. As I talked about moments ago, we are going to talk about sustainability today. What I didn't mention is that digital sustainability is actually kind of complicated. There are so many factors. It's a bit of like an inexact science. There are so many moving parts that have to be considered, like big and small. So sometimes you're not sure how to sort of fit it all into this quadratic equation. But we need to talk about it because it has to do a lot of the time with how the electricity is generated, and that factors into the bigger conversation that we're going to have today.

But that electricity is also what powers ICTs, which is information and communication technologies. What are those? Well, it's really all the sort of digital technologies that sort of surround you, or relies on cell phones, computers, laptops, TV, internet, Wi-Fi, etc, etc, etc. So ICT is really all around us. In fact, ICT makes up, or uses up, really, 7% of the electricity worldwide. Pretty impressive. In fact, they're responsible for about 4% of the CO2 emissions worldwide. That's more than the aviation industry, and, in fact, it's even more than some countries on their own. Pretty impressive. But in talking about that, we also need to talk about things like data centers, part of ICT, networks, and consumer devices. As I mentioned, the laptop that I'm recording this talk on, the cellphone that won't stop ringing during my presentation, I don't know. The TV that I watch during Netflix, or ESPN, or sports, whatever it is. That's all ICT, and we are surrounded by that. Another thing, a very important thing to consider is location. You know what they say, location, location, location, very important. Well, here's what I'm talking about.

Check out more articles and videos

We constantly think of articles and videos that might spark Git people interest / skill us up or help building a stellar career

A Guide to React Rendering Behavior
React Advanced Conference 2022React Advanced Conference 2022
25 min
A Guide to React Rendering Behavior
Top Content
React is a library for "rendering" UI from components, but many users find themselves confused about how React rendering actually works. What do terms like "rendering", "reconciliation", "Fibers", and "committing" actually mean? When do renders happen? How does Context affect rendering, and how do libraries like Redux cause updates? In this talk, we'll clear up the confusion and provide a solid foundation for understanding when, why, and how React renders. We'll look at: - What "rendering" actually is - How React queues renders and the standard rendering behavior - How keys and component types are used in rendering - Techniques for optimizing render performance - How context usage affects rendering behavior| - How external libraries tie into React rendering
Speeding Up Your React App With Less JavaScript
React Summit 2023React Summit 2023
32 min
Speeding Up Your React App With Less JavaScript
Top Content
Too much JavaScript is getting you down? New frameworks promising no JavaScript look interesting, but you have an existing React application to maintain. What if Qwik React is your answer for faster applications startup and better user experience? Qwik React allows you to easily turn your React application into a collection of islands, which can be SSRed and delayed hydrated, and in some instances, hydration skipped altogether. And all of this in an incremental way without a rewrite.
React Concurrency, Explained
React Summit 2023React Summit 2023
23 min
React Concurrency, Explained
Top Content
React 18! Concurrent features! You might’ve already tried the new APIs like useTransition, or you might’ve just heard of them. But do you know how React 18 achieves the performance wins it brings with itself? In this talk, let’s peek under the hood of React 18’s performance features: - How React 18 lowers the time your page stays frozen (aka TBT) - What exactly happens in the main thread when you run useTransition() - What’s the catch with the improvements (there’s no free cake!), and why Vue.js and Preact straight refused to ship anything similar
The Future of Performance Tooling
JSNation 2022JSNation 2022
21 min
The Future of Performance Tooling
Top Content
Our understanding of performance & user-experience has heavily evolved over the years. Web Developer Tooling needs to similarly evolve to make sure it is user-centric, actionable and contextual where modern experiences are concerned. In this talk, Addy will walk you through Chrome and others have been thinking about this problem and what updates they've been making to performance tools to lower the friction for building great experiences on the web.
Optimizing HTML5 Games: 10 Years of Learnings
JS GameDev Summit 2022JS GameDev Summit 2022
33 min
Optimizing HTML5 Games: 10 Years of Learnings
Top Content
The open source PlayCanvas game engine is built specifically for the browser, incorporating 10 years of learnings about optimization. In this talk, you will discover the secret sauce that enables PlayCanvas to generate games with lightning fast load times and rock solid frame rates.
When Optimizations Backfire
JSNation 2023JSNation 2023
26 min
When Optimizations Backfire
Top Content
Ever loaded a font from the Google Fonts CDN? Or added the loading=lazy attribute onto an image? These optimizations are recommended all over the web – but, sometimes, they make your app not faster but slower.
In this talk, Ivan will show when some common performance optimizations backfire – and what we need to do to avoid that.

Workshops on related topic

React Performance Debugging Masterclass
React Summit 2023React Summit 2023
170 min
React Performance Debugging Masterclass
Top Content
Featured WorkshopFree
Ivan Akulov
Ivan Akulov
Ivan’s first attempts at performance debugging were chaotic. He would see a slow interaction, try a random optimization, see that it didn't help, and keep trying other optimizations until he found the right one (or gave up).
Back then, Ivan didn’t know how to use performance devtools well. He would do a recording in Chrome DevTools or React Profiler, poke around it, try clicking random things, and then close it in frustration a few minutes later. Now, Ivan knows exactly where and what to look for. And in this workshop, Ivan will teach you that too.
Here’s how this is going to work. We’ll take a slow app → debug it (using tools like Chrome DevTools, React Profiler, and why-did-you-render) → pinpoint the bottleneck → and then repeat, several times more. We won’t talk about the solutions (in 90% of the cases, it’s just the ol’ regular useMemo() or memo()). But we’ll talk about everything that comes before – and learn how to analyze any React performance problem, step by step.
(Note: This workshop is best suited for engineers who are already familiar with how useMemo() and memo() work – but want to get better at using the performance tools around React. Also, we’ll be covering interaction performance, not load speed, so you won’t hear a word about Lighthouse 🤐)
Building WebApps That Light Up the Internet with QwikCity
JSNation 2023JSNation 2023
170 min
Building WebApps That Light Up the Internet with QwikCity
Featured WorkshopFree
Miško Hevery
Miško Hevery
Building instant-on web applications at scale have been elusive. Real-world sites need tracking, analytics, and complex user interfaces and interactions. We always start with the best intentions but end up with a less-than-ideal site.
QwikCity is a new meta-framework that allows you to build large-scale applications with constant startup-up performance. We will look at how to build a QwikCity application and what makes it unique. The workshop will show you how to set up a QwikCitp project. How routing works with layout. The demo application will fetch data and present it to the user in an editable form. And finally, how one can use authentication. All of the basic parts for any large-scale applications.
Along the way, we will also look at what makes Qwik unique, and how resumability enables constant startup performance no matter the application complexity.
Next.js 13: Data Fetching Strategies
React Day Berlin 2022React Day Berlin 2022
53 min
Next.js 13: Data Fetching Strategies
Top Content
WorkshopFree
Alice De Mauro
Alice De Mauro
- Introduction- Prerequisites for the workshop- Fetching strategies: fundamentals- Fetching strategies – hands-on: fetch API, cache (static VS dynamic), revalidate, suspense (parallel data fetching)- Test your build and serve it on Vercel- Future: Server components VS Client components- Workshop easter egg (unrelated to the topic, calling out accessibility)- Wrapping up
React Performance Debugging
React Advanced Conference 2023React Advanced Conference 2023
148 min
React Performance Debugging
Workshop
Ivan Akulov
Ivan Akulov
Ivan’s first attempts at performance debugging were chaotic. He would see a slow interaction, try a random optimization, see that it didn't help, and keep trying other optimizations until he found the right one (or gave up).
Back then, Ivan didn’t know how to use performance devtools well. He would do a recording in Chrome DevTools or React Profiler, poke around it, try clicking random things, and then close it in frustration a few minutes later. Now, Ivan knows exactly where and what to look for. And in this workshop, Ivan will teach you that too.
Here’s how this is going to work. We’ll take a slow app → debug it (using tools like Chrome DevTools, React Profiler, and why-did-you-render) → pinpoint the bottleneck → and then repeat, several times more. We won’t talk about the solutions (in 90% of the cases, it’s just the ol’ regular useMemo() or memo()). But we’ll talk about everything that comes before – and learn how to analyze any React performance problem, step by step.
(Note: This workshop is best suited for engineers who are already familiar with how useMemo() and memo() work – but want to get better at using the performance tools around React. Also, we’ll be covering interaction performance, not load speed, so you won’t hear a word about Lighthouse 🤐)
Maximize App Performance by Optimizing Web Fonts
Vue.js London 2023Vue.js London 2023
49 min
Maximize App Performance by Optimizing Web Fonts
WorkshopFree
Lazar Nikolov
Lazar Nikolov
You've just landed on a web page and you try to click a certain element, but just before you do, an ad loads on top of it and you end up clicking that thing instead.
That…that’s a layout shift. Everyone, developers and users alike, know that layout shifts are bad. And the later they happen, the more disruptive they are to users. In this workshop we're going to look into how web fonts cause layout shifts and explore a few strategies of loading web fonts without causing big layout shifts.
Table of Contents:What’s CLS and how it’s calculated?How fonts can cause CLS?Font loading strategies for minimizing CLSRecap and conclusion
High-performance Next.js
React Summit 2022React Summit 2022
50 min
High-performance Next.js
Workshop
Michele Riva
Michele Riva
Next.js is a compelling framework that makes many tasks effortless by providing many out-of-the-box solutions. But as soon as our app needs to scale, it is essential to maintain high performance without compromising maintenance and server costs. In this workshop, we will see how to analyze Next.js performances, resources usage, how to scale it, and how to make the right decisions while writing the application architecture.