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

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