FOSDEM 2024 - Fast JavaScript with Data-Oriented Design
FOSDEM 2024/Schedule/Events/Developer rooms/Web Performance/Fast JavaScript with Data-Oriented Design Let’s squeeze the last bits of performance out of JS so that we can crunch massive amounts of data! In this presentation I will describe what I learned while optimizing the Firefox Profiler. The Firefox Profiler is a web application which needs to handle large profiles containing hundreds of thous
Faster TypeScript builds with --isolatedDeclarations by Titian-Cornel Cernicova-Dragomir - GitNation
Type-checking a TypeScript codebase can be slow, especially for monorepos containing lots of projects that each need to use the type checker to generate type declaration files. In this talk, we introduce — for the very first time — a new TypeScript feature we are working on called “Isolated Declarations” that allows DTS files to be generated without using the type checker at all! This opens the do
The Cost Of JavaScript - 2023
As we build sites that are more heavily reliant on JavaScript, we sometimes pay for what we send down in ways that we can’t always easily see. In this talk, Addy explains how and why JavaScript is the most expensive resource your site uses today—especially on mobile and lower-end desktops. Web developers should focus on optimizing JavaScript bundles by keeping them small to improve download speed
My talk on CSS runtime performance
A few months ago, I gave a talk on CSS performance at performance.now in Amsterdam. The recording is available online: (You can also read the slides.) This is one of my favorite talks I’ve ever given. It was the product of months (honestly, years) of research, prompted by a couple questions: What is the fastest way to implement scoped styles? (Surprisingly few people seem to ask this question.) Do
Performance Tips for Background Video
Doug Sillars (@dougsillars) is a leading mobile developer advocate and evangelist. He is widely known as an expert in mobile application architecture, especially when it comes to performance. Doug has worked with thousands of developers around the world, helping them improve the speed, battery life and customer satisfaction of their applications (both native and web). The author of O'Reilly's "Hig
Faster apps with JSON.parse (Chrome Dev Summit 2019)
Because the JSON grammar is much simpler than JavaScript’s grammar, JSON can be parsed more efficiently than JavaScript. This knowledge can be applied to improve start-up performance for web apps that ship large JSON-like configuration object literals (such as inline Redux stores). Presented by: Mathias Bynens - https://goo.gle/2Oh2tq6 More info → https://goo.gle/33czWGH #ChromeDevSummit All S
The Cost Of JavaScript - Addy Osmani - Fluent 2018
As the world build sites that are more heavily reliant on JavaScript, we sometimes pay for what we send down in ways that we can’t always easily see. Addy Osmani explains how and why JavaScript is the most expensive resource your site uses today—especially on mobile. Addy also shares tips for fixing JavaScript performance issues so everything loads quicker. A little discipline can help if you wan
Evolution of <img>: Gif without the GIF
Colin Bendell is a performance and ideas junkie. He is co-author of O'Reilly's High Performance Images and part of the CTO Office at Cloudinary. tl;dr GIFs are awesome but terrible for quality and performance Replacing GIFs with <video> is better but has perf. drawbacks: not preloaded, uses range requests Now you can <img src=".mp4">s in Safari Technology Preview Early results show mp4s in <img> t
Netflix JavaScript Talks - Performance Signup in React & Transactional Apps with Redux
In this episode of Netflix JavaScript Talks, Tony Edwards (@tedwards947) discusses how Netflix improved the performance of the signup experience with its React-based architecture. Jeff Shi goes in depth on how Netflix uses Redux to handle the complexity of a transactional application such as the new account signup experience on Netflix.com.
How Streaming Can Supercharge React - Sasha Aickin aka @xander76 at ReactEurope 2017
React’s server-side rendering speeds up page load times, but it’s far from the only performance boost we can get on the server. In this talk, I’ll discuss how exploiting streaming and parallel processing on the server and browser can get us faster time to first byte, faster time to first paint, and faster time to full interactivity.
Web Performance: Leveraging the Metrics that Most Affect User Experience (Google I/O '17)
Performance is crucial for user engagement, especially on mobile web. Yet users are regularly bogged down by slow page loads, delayed interactivity after page load, high input latency on critical interactions (tap, click, scroll etc), and janky animations or scrolling. These negative experiences turn away users and hurt businesses. Developers need to measure performance in the real world to get i
Profiling Paint Perf 🔎 🎨
In this episode of perf.html we take a look at techniques in chrome devtools to identify paint bottlenecks and how to live edit the code and remeasure to minimize tie spent in paint to make pages faster. Demo app: https://github.com/samccone/perf.html/tree/master/paint_demo Demo performance fix: https://github.com/samccone/perf.html/commit/a033af895cb39c1d466837b263503f0f3448976e CSS triggers
Dev.Opera — Front-End Performance: The Dark Side
On April 1st, I spoke at the very first Fronteers Spring Conference. The theme of the whole conference was performance. For my presentation, I decided to try something a little bit different: instead of talking about techniques that lead to better client-side performance, I focused on security-sensitive situations in which performance can actually be a bug rather than a feature. View the slides he
Jank Free: Let's Make the Web Silky Smooth!
What is Jank? Modern browsers try to refresh the content on screen in sync with a device's refresh rate. For most devices today, the screen will refresh 60 times a second, or 60Hz. If there is some motion on screen (such as scrolling, transitions, or animations) a browser should create 60 frames per second to match the refresh rate. Jank is any stuttering, juddering or just plain halting that user
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Focused Session: Performance profiling for Web Applications with Sam Saccone
Demystifying Speed Tooling (Google I/O ’19)
AT&T Video Optimizer - Mobile App Tool | AT&T Developer
Video Streaming: What Is a Performant Video Stream?
What I Learned Benchmarking React - Dominic Gannaway aka @trueadm at @ReactEurope 2017
Pusher | Leader In Realtime Technologies