A standard Python Docker image for a FastAPI application typically ranges from 150 MB to 1 GB, depending on the base image and dependencies. A Nuitka-compiled equivalent can drop to under 40 MB using a distroless base, with faster startup and no Python interpreter exposed in the container.
This guide covers the multi-stage build pattern that makes this work reliably.
Distributing a Python application without requiring users to install Python—or without exposing your source code—requires a packaging tool. Three tools dominate this space: Nuitka, PyInstaller, and cx_Freeze. Each takes a fundamentally different approach, and choosing the wrong one costs you startup time, binary size, or runtime stability.
This guide cuts through the marketing and gives you the technical detail needed to make an informed decision.
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