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The Cold Start Illusion: Optimizing Kernel-Level Context Switching and Cache Locality for Multi-Tenant Serverless
Oct 11, 2026•14 min read

Optimizing Kernel Context and Cache Locality for Multi-Tenant Serverless

There's a number you need to see. It's been staring at us from dashboards in AWS, Cloudflare, and every hyperscaler on the planet for the better part of a decade: the 200ms p99 cold start.

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