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Dev tools · August 30, 2021

Skybison, an optimized greenfield Python runtime

Instagram's experimental performance oriented greenfield implementation of Python. - facebookarchive/skybison

Skybison, an optimized greenfield Python runtime launched on August 30, 2021 with 13 votes, #1,238 of 2,953 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 5 years on.

In plain words

Skybison is an optimized Python runtime designed for greenfield projects. Built from the ground up rather than based on existing implementations, it aims to improve Python performance for new applications. The project is intended for developers working on fresh Python codebases who want enhanced execution efficiency. It was released on GitHub and represents an alternative approach to the standard Python interpreter.

written from the facts on this page · September 2026

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