Uzumibi: Reinventing mruby for the Edges
summary
Rust rewrite of mruby called MRubyEdge compiles to tiny wasm that runs on Cloudflare Workers, Fastly Compute, and Google Cloud Run, connects to KVS, Durable Objects and queues, and produces ~300 kilobytes uncompressed artifacts versus typical ~10 MB Ruby.wasm and a deployed demo at ~1.2 MB. Development hits: ~84% of mruby 4.0 instructions implemented by mid‑2025, async integration remains unresolved—Asyncify bloats binaries ~1.5× and an async VM POC yields responsive browser UI but needs work for production.
AI-written summary · about
chapters (10)
- 0:00Introduction and motivation
- 4:13Introducing MRubyEdge
- 7:26Development journey of MRubyEdge
- 13:55Key implementation details
- 15:48Progress and standard library
- 17:13Testing on Cloudflare Workers
- 19:39Integration with edge services
- 20:01Design philosophy and simplicity
- 23:56Future challenges and async
- 28:15Conclusion and call to action
