JavaScript's Journey to the Edge
summary
History and benchmarks support a concrete claim: V8 isolates plus WebAssembly run serverless code at the Edge with sub-250 ms median responses where origin pages take 500–600 ms, enabling fresh, global responses from Cloudflare’s network. The build is a worker runtime with a CLI called Wrangler and a workers.dev free tier for immediate deployment. Security mitigations include disabling high-resolution timers and restricting local concurrency to blunt Spectre exploits, and the implementation demonstrates fast startup, high density, and practical isolation.
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