Componentizing Fastly Compute

on YouTube ↗27m

" summary

Fastly explains how it applies the WebAssembly component model in its Compute edge service to get capability-based security, a representation-normalizing IDL (WIT), and cross-language composition. The talk covers production deployment details including adapting WASI-core modules to components via a zero-allocation component adapter and automated customer-code editing to replace network hops with direct in-process calls. It also presents a Python case study showing how components enable CPython without POSIX or a filesystem (using memory-freezing) and how WIT-generated bindings produce idiomatic APIs.

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