Remove articles how-javascript-engine-works
article thumbnail

In Defence of DOM­Content­Loaded

CSS Wizardry

Honestly, I started writing this article, for no real reason and somewhat without context, in December 2022—over half a year ago! Diagnostic metrics such as these can highlight bottlenecks, and how they might ultimately impact the user experience in other ways, even if not directly. What Does It Actually Mean? View unabridged.

Metrics 326
article thumbnail

The HTTP/1-liness of HTTP/2

CSS Wizardry

This article started life as a Twitter thread , but I felt it needed a more permanent spot. The white bars show how long the browser queued the request for. No matter how I do it, it will take me 52 seconds to finish the job. Thankfully, the (s)lowest common denominator works just fine for a game of cards.

Games 130
Insiders

Sign Up for our Newsletter

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Trending Sources

article thumbnail

The State Of Web Workers In 2021

Smashing Magazine

iOS empowers developers to easily parallelize code using Grand Central Dispatch , Android does this via their new, unified task scheduler WorkManager and game engines like Unity have job systems. Quite a lot of work. The browser has to go through a variety of work for each frame it puts on the screen. JavaScript.

Games 145
article thumbnail

Understanding Weak Reference In JavaScript

Smashing Magazine

Understanding Weak Reference In JavaScript. Understanding Weak Reference In JavaScript. Though useful, weak references are not often used in JavaScript. WeakSet and WeakMap were introduced to JavaScript in the ES6 version. WeakSet and WeakMap were introduced to JavaScript in the ES6 version. Frank Joseph.

Cache 116
article thumbnail

How To Build Resilient JavaScript UIs

Smashing Magazine

How To Build Resilient JavaScript UIs. How To Build Resilient JavaScript UIs. Fortunately, we as engineers can avoid, or at least mitigate the impact of breakages in the web apps we build. JavaScript is less forgiving. We instruct JavaScript what to do if something unexpected happens. Callum Hart.

Network 145
article thumbnail

Five Data-Loading Patterns To Improve Frontend Performance

Smashing Magazine

Every unnecessary bit of JavaScript code you bundle and serve will be more code the client has to load and process. At the bottom of the page, you can check how many kB of resources your client consumes. It is important to note how much data the client needs to download. How will you serve blazingly fast code, then?

Cache 125
article thumbnail

The Fight For The Main Thread

Smashing Magazine

The Fight For The Main Thread The Fight For The Main Thread Geoff Graham 2023-10-24T18:00:00+00:00 2023-10-24T22:02:26+00:00 This article is sponsored by SpeedCurve Performance work is one of those things, as they say, that ought to happen in development. JavaScript is loaded, and scripts are executed. The HTML is parsed.

Google 90