We will tell the story of how node:ffi made its way into Node.js core: from the original implementation work by Bryan English, through the renewed initiative started by Colin Ihrig, to the final design and implementation that landed in Node.js.
We'll walk through the original exploration, the technical challenges, and the lessons learned while trying to expose foreign function interfaces safely and ergonomically to JavaScript developers, then cover the final implementation, the API shape, the design trade-offs, and the performance characteristics measured along the way.
This talk is for anyone interested in native interoperability, Node.js internals, performance, or the long path from an experimental idea to a core module.