WHY DOESN'T CLOUDFLARE USE CONTAINERS IN ITS WORKERS PLATFORM INFRASTRUCTURE?

Summary from the TLDR Web Dev newsletter

Cloudflare's Workers platform uses a V8 isolate architecture instead of traditional containers due to their ability to achieve sub-millisecond serverless latency and support a massive number of tenants without sharing memory or state. Unlike containers, which take hundreds of milliseconds to seconds to spin up, V8 isolates warm up in under 5 milliseconds. This lets Cloudflare run thousands of tenant workloads at the edge with minimal overhead. However, this has its own limitations, such as the lack of process-level isolation.