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.
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 Deoptimizations.
44:59 Node.js Compat, what to use and avoid with LLRT.
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.

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