Best of Cloudflare — December 2025

1. 1
   Article

   Cloudflare·24w

   Python Workers redux: fast cold starts, packages, and a uv-first workflow

   Cloudflare Python Workers now support any Pyodide-compatible package with significantly faster cold starts than competitors. Using memory snapshots and WebAssembly architecture, Workers achieve 2.4x faster cold starts than AWS Lambda and 3x faster than Google Cloud Run when loading common packages. The platform integrates with uv for package management through pywrangler tooling, enabling easy deployment of Python applications globally. Technical innovations include memory snapshot restoration, careful entropy handling for randomness, and function pointer table management to eliminate Python initialization overhead during cold starts.

   31
2. 2
   Article

   Cloudflare·22w

   Code Orange: Fail Small — Our resilience plan following recent incidents

   Cloudflare declared "Code Orange: Fail Small" following two major outages in November and December 2025. Both incidents were caused by instantaneous global deployment of configuration changes that broke the network. The resilience plan focuses on three areas: implementing controlled rollouts for configuration changes (similar to existing software deployment processes), reviewing and improving failure modes across all systems to handle errors gracefully, and fixing break glass procedures to remove circular dependencies. The goal is to ensure configuration changes pass through testing gates before global deployment, preventing single changes from taking down the entire network.

   24

   1