Python Workers redux: fast cold starts, packages, and a uv-first workflow
5 days ago
- #Cloudflare
- #Serverless
- #Python Workers
- AWS Lambda support for Python Workers has been updated.
- Python Workers now support any package compatible with Pyodide, including pure Python and dynamic library-dependent packages.
- Cold start times have been significantly reduced using memory snapshots, making Python Workers 2.4x faster than AWS Lambda without SnapStart and 3x faster than Google Cloud Run.
- Developers can deploy Python applications globally in under 2 minutes using tools like uv and pywrangler.
- Python Workers support various use cases, including HTTP requests, cron triggers, Workflows, and WebSocket servers.
- Memory snapshots and sharding are key technologies reducing cold start frequency and improving performance.
- Future enhancements include better tooling, faster cold starts, more package support, and additional bindings.