791: LLRT The Serverless Runtime w/ Richard Davison

791: LLRT The Serverless Runtime w/ Richard Davison

Scott and Wes chat with Richard Davison from AWS about LLRT, a new runtime tailored specifically for Lambda. They dive into the benefits of using LLRT, challenges with JavaScript in serverless, and why Rust was chosen for its development. Show Notes 00:00 Welcome to Syntax! 01:07 Who is Richard Davison? 05:11 What is LLRT and what’s the motivation for building it? 08:25 AWS Lambda example. 11:20 What makes LLRT specifically tailored to Lambda? 14:55 Brought to you by Sentry.io. 15:22 Node.js in Lambda. 16:00 What are some challenges that people have with JavaScript in serverless? 17:20 Lambda memory configuration. 19:23 Managing cost of compute. 21:29 Simpler and faster than Node, Bun, Dino, but not a replacement. 22:31 The benchmarks. 27:00 Quick.js, the main reason for the performance gains. Fabrice Bellard QuickJS. 28:03 The Quick.js engine. 30:35 What was the reason behind creating Quick.js? 33:46 What made you pick Rust for LLRT? 36:34 Abstractions and the value of speed. 39:08 The JIT Compiler. 42:38 Compile cache. 43:27 De-optimizations. 44:59 Node.js Compat, what to use and avoid with LLRT. GitHub AWS Labs Compatibility Chart. 47:52 Will you target with WinterCG spec? 50:22 Streams API. 52:06 What about WebSockets? 53:10 Is this going to be promoted from a labs project? 54:49 Sick Picks + Shameless Plugs. Sick Picks Richard: QuickJS Engine, JSLinux. Shameless Plugs Richard: Javascript Hit us up on Socials! Syntax: X Instagram Tiktok LinkedIn Threads Wes: X Instagram Tiktok LinkedIn Threads Scott: X Instagram Tiktok LinkedIn Threads Randy: X Instagram YouTube Threads

Jaksot(999)

999: Writing Maintainable CSS

999: Writing Maintainable CSS

Scott and Wes break down what makes CSS truly manageable—from preventing style leaks and embracing fluid layouts to choosing the right methodology, whether that’s utility CSS, component-scoped styles,...

27 Huhti 50min

998: How to Fix Vibe Coding

998: How to Fix Vibe Coding

Wes and Scott talk about making AI coding more reliable using deterministic tools like fallow, knip, ESLint, StyleLint, and Sentry. They cover code quality analysis, linting strategies, headless brows...

22 Huhti 44min

997: Rating and Roasting Your Projects

997: Rating and Roasting Your Projects

Scott and Wes dig into a huge batch of community-submitted projects, from JSON tools and CSS editors to AI agents, view transitions, and everything in between. It’s a rapid-fire showcase of what devel...

20 Huhti 53min

996: 10 New CSS and HTML APIs

996: 10 New CSS and HTML APIs

Wes and Scott talk about the latest CSS and browser features, including the Grid Lines API for masonry layouts, HTML in Canvas, name-only container queries, CSS random, search-text styling, and more. ...

15 Huhti 31min

995: Next.js Vendor Lock-in No More

995: Next.js Vendor Lock-in No More

In this episode, Scott and Wes sit down with Tim Neutkens and Jimmi Lai from the Next.js team to dig into the new Adapters API, what it takes to run Next.js across platforms like Cloudflare and Netlif...

13 Huhti 1h 4min

994: AI Sucks At CSS

994: AI Sucks At CSS

In this potluck episode of Syntax, Wes and Scott answer your questions about AI struggles with CSS and design workflows, learning vs relying on AI, debugging web performance, beginner soldering setups...

8 Huhti 1h

993: It’s Been A Hell Of Week

993: It’s Been A Hell Of Week

Scott and Wes break down a chaotic week in dev news — the Claude Code source leak, a nasty Axios npm supply chain hack, and Railway’s private cache exposure — plus how to keep these nightmare scenario...

6 Huhti 38min

992: Migrating Legacy Code Just Got Easier

992: Migrating Legacy Code Just Got Easier

Wes and Scott talk about migrating large codebases with AI — how to plan framework and language moves, establish patterns, handle templating changes, test thoroughly, safely deploy, and more. Show N...

1 Huhti 29min

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