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

Episoder(988)

940: Picking a Fullstack Stack, Is Next.js Too Complex? Services vs Self-Hosted + More

940: Picking a Fullstack Stack, Is Next.js Too Complex? Services vs Self-Hosted + More

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939: Creator of Vite: Evan You

939: Creator of Vite: Evan You

Scott and Wes sit down with Evan You, creator of Vue, Vite, and VoidZero, to dig into the future of frontend tooling. From the speed of Rolldown to why he chose Rust, they explore the evolution of dev...

22 Sep 202554min

938: Hot Takes + Bike Shedding

938: Hot Takes + Bike Shedding

Wes and Scott dive into some hot takes and classic debates—tabs vs spaces, camel vs snake case, export styles, barrel files, variable naming, and more. Show Notes 00:00 Welcome to Syntax! 01:26...

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937: Is The Omarchy Hype Real?

937: Is The Omarchy Hype Real?

Scott takes Wes on a tour of Omarchy, DHH’s polished Arch + Hyprland Linux setup that promises speed, beauty, and endless keyboard shortcuts. From first impressions to daily workflows, Scott debates w...

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936: Realtime LED Wall With React + Websockets (I Let Strangers Control It)

936: Realtime LED Wall With React + Websockets (I Let Strangers Control It)

Scott, Wes, and CJ dive into Wes’s Hackweek project: a real-time, web-controlled LED grid. They break down the hardware build, custom 3D-printed diffuser, ESP32 microcontroller, and Cloudflare durable...

10 Sep 202547min

935: CJ Made A Sega Game In 2025

935: CJ Made A Sega Game In 2025

CJ takes us behind the scenes of Hackweek to share how he built a custom Sega Genesis game from scratch, complete with assembly code, level loading, and retro hardware tricks. From SGDK to parallax fa...

8 Sep 202552min

934: We Built a Real-Time, Local-Data, Competitive Coding Game

934: We Built a Real-Time, Local-Data, Competitive Coding Game

Scott, Wes, and CJ dive into SynHax, Scott’s Hackweek project for code battles. They discuss live coding duels, referee controls, and the surprisingly simple tech stack that delivers instant updates a...

3 Sep 202537min

933: Hackweek Overview - What Is It, What Did We Build

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It’s Hackweek at Syntax! Scott, Wes, and CJ break down what Hackweek is all about - how they picked their projects, what came out of them, and why it’s the best excuse to experiment, build, and have f...

1 Sep 202532min

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