Alternative Python Implementation "Pyston" Plans For Greater Performance, 64-bit ARM
While Dropbox continued developing Pyston publicly from 2014 to 2017, they stopped supporting it with having moved their performance-sensitive code to other languages. But the original developers then restarted work on it and released Pyston 2.0 in 2020.
Pyston 2.0 was made closed-source along with the follow-on 2.1 release but then Pyston 2.2 this year returned it to being open-source. Then in August it was announced the Pyston developers joined Anaconda to continue their work on this high performance Python implementation.
Now with having a reliable footing under the Anaconda organization, they have published a road-map for their intentions moving forward. Along with establishing a proper CI/CD system, Pyston developers are working to provide packages through Conda. In the near-term they are also working on 64-bit ARM support and continued performance improvements.
Longer-term they are planning for macOS and Windows support, Numba integration, improved multi-threading, opt-in features that could potentially break semantics, and keeping up with performance optimizations. Right now they are reporting 30% faster than CPython for their main benchmarks and 60% faster for other commonly-used benchmarks. Next year they also plan to shift their Python version target against v3.10.
More details on the Pyston roadmap via the Pyston.org blog.