Lightning Talk: What If the Runtime Was Portable Too? Self-Hosted Runtime Capabilitie...
summary
A minimal Wasm runtime compiled to Wasm called Chihuahua runs on existing runtimes to make features like checkpoint/restore, tracing, and unsupported Wasm proposals portable across hosts. Two concrete optimizations are instruction merging (reduces stack push/pop by turning fetched arguments into immediates) and host passthrough (redirects expensive WASI functions to the host). Prototype shows ~1.4× speed vs prior self-hosted runtimes but large slowdowns on SQLite due to duplicate runtime overhead; SIMD is not yet supported.
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chapters (13)
- 0:00Introduction
- 0:22Portability in WASM
- 1:48Runtime limitations
- 2:32Self-hosted runtime
- 3:15Runtime extensions
- 3:36Checkpoint and restore
- 4:19Tracing via runtime
- 4:59Unsupported WASM features
- 5:42Performance challenges
- 6:46Optimization in Chihuahua
- 7:50Performance results
- 8:32Summary
- 9:22Q&A
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