Building a JavaScript runtime

on YouTube ↗14m

" summary

A CDN prototype evolves into a real JavaScript runtime: starts as a fast Go proxy, adds embedded JS via isolated VM in node to run v8 isolates, then reimplements control and event loop in Rust v8 runtime inspired by Deno. Traffic and feature requests force a rewrite; event loop lag spikes around 2 ms in node, while the Rust runtime handles DNS and user code in under 1 ms. The runtime works and users fork and extend it.

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" chapters (6)

1. 0:00Start
2. 3:52Go Based Javascript Runtimes
3. 4:13Javascript Is Really Slow
4. 5:28V8 and Go
5. 5:55Isolated Vm
6. 9:27Event Loop Lag

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