WASI

The open-source runtime executes Node.js v24 applications inside a WASIX sandbox without Docker, passing 99 percent of the Node.js test suite while trading 5 to 30 percent of native performance for process-level isolation.

WebAssembly's server-side moment arrives as WASI 0.3 finalizes native async support and Akamai deploys Fermyon's Spin across 4,000 edge locations.