WebAssembly adoption hinges on the Component Model. Luke Wagner discusses Preview 3 updates and how Wasm is evolving for edge and serverless environments.

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Luke Wagner of Fastly, speaking at Wasm I/O in Barcelona, outlined the path to WebAssembly Component Model 1.0. The key barrier to mass Wasm adoption is insufficient upstream support in popular languages and frameworks. Preview 3 will extend the component model with async functions, strings, futures, and concurrency primitives. Additional planned improvements include lazy memory allocation, multi-value returns, error context values, and a GC API. The JCO tool currently transpiles components to JavaScript for browser use, while native browser support is being pursued for performance gains. Wagner called on the community to contribute tooling, documentation, and upstream language support to accelerate adoption.

WebAssembly is now outperforming containers at the edge

<p>How is this an article from april 2026 and yet the referenced models are as old as 2 years</p>
