facebookincubator/MetaPython on Hacker News

…For example, Cinder, Meta's internal version of CPython, supports what they call "static classes": https://github.com/facebookincubator/cinder?tab=readme-ov-fi... .

comment by ngrilly · 2025-09-29 · in Why we develop EloqDB mainly in C++

…similar to what Cider is enabling with their opt-in strict modules and static classes: https://github.com/facebookincubator/cinder .

comment by ngrilly · 2025-07-08 · in Reflections on 2 years of CPython's JIT Compiler

Is anyone familiar with Instagram's cinder? https://github.com/facebookincubator/cinder cinder includes changes for immutable module objects. I wonder if the implementation is similar? Or is cinder so old that it would be incompatible with…

comment by mgraczyk · 2025-05-18 · in Project Verona: Fearless Concurrency for Python

…all the Python code they have with something else was worth it, they'd have done it already. [0] https://github.com/facebookincubator/cinder

comment by byroot · 2024-11-03 · in Next Generation Out of Band Garbage Collection

Cinder's benchmarks don't seem "like Java" performance, given they aren't that far off cython. https://github.com/facebookincubator/cinder/blob/cinder/3.8/...

comment by foobazgt · 2024-11-03 · in Next Generation Out of Band Garbage Collection

…directly to upstream cpython. If you really wanted to, the internal fork is also open source: https://github.com/facebookincubator/cinder

comment by phyrex · 2024-04-10 · in Meta used monolithic architecture to ship Threads in only five months

…resources are magnitudes more than mastodon, the lessons from Meta might not be very applicable. https://github.com/facebookincubator/cinder

comment by thewataccount · 2023-09-14 · in The inside story of Threads

…is largely due to Meta maintaining an internal performance-oriented production version of CPython: https://github.com/facebookincubator/cinder .

comment by Mxbonn · 2023-09-14 · in The inside story of Threads

https://github.com/facebookincubator/cinder Instagram (and presumably threads) runs on Cinder which is Meta's fork cpython with GIL removed.

comment by IceWreck · 2023-07-08 · in If PEP 703 is accepted, Meta can commit three engineer-years to no-GIL CPython

…had to choose between the two 3 months ago). Meta has its own production fork of CPython, Cinder: https://github.com/facebookincubator/cinder

comment by fmajid · 2023-07-08 · in If PEP 703 is accepted, Meta can commit three engineer-years to no-GIL CPython

They’ve kind of done that with Cinder https://github.com/facebookincubator/cinder . Threads and Instagram lie on top of this and it’s essentially a fork of Python 3.10. I think the problem there is even a company like Meta wants to rest on…

comment by svaha1728 · 2023-07-08 · in If PEP 703 is accepted, Meta can commit three engineer-years to no-GIL CPython

https://github.com/facebookincubator/cinder

comment by nerdponx · 2023-07-06 · in Backend of Meta Threads is built with Python 3.10

That is just CPython fork from instagram https://github.com/facebookincubator/cinder/

comment by ddorian43 · 2023-07-06 · in Backend of Meta Threads is built with Python 3.10

You might enjoy Cinder then. It's based on CPython so it is nearly 100% compatible. https://github.com/facebookincubator/cinder/ Disclaimer: I used to work on it.

comment by tekknolagi · 2023-03-15 · in Python-based compiler achieves orders-of-magnitude speedups

Have a look at Cinder - https://github.com/facebookincubator/cinder - it's Meta's performance oriented fork of CPython that they use to run Instagram (which is a big Django app).

comment by jstx1 · 2023-03-15 · in Python-based compiler achieves orders-of-magnitude speedups

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Cinder: Meta's internal performance-oriented production version of CPython

story by cpeterso · 2022-09-22 · 75 comments

…typing.TypeVar() and typing.NewType() - Wrap type aliases inside a TYPE_CHECKING conditional block https://github.com/facebookincubator/cinder/blob/cinder/3.8/... Caveat emptor (buyer beware). Python at scale doesn't sound fun at all.…

comment by metadat · 2022-09-20 · in Python Lazy Imports with Cinder

Would recommend checking out https://github.com/facebookincubator/cinder

comment by rockwotj · 2022-09-18 · in S6: A standalone JIT compiler library for CPython

…That's why Facebook are putting so much work into running a more performant fork of CPython - https://github.com/facebookincubator/cinder

comment by jstx1 · 2022-07-27 · in Programming languages endorsed for server-side use at Meta

This article captures a lot of the rationale behind why we're building Static Python within Cinder: https://github.com/facebookincubator/cinder#static-python

comment by czardoz · 2022-04-22 · in Python’s “type hints” are a bit of a disappointment to me

…right data structures, inlining is possible. For example, I add an inliner to our Python JIT here: https://github.com/facebookincubator/cinder/commit/f3c50b393... The SSA IR makes this reasonably straightforward. The harder part was…

comment by tekknolagi · 2022-03-31 · in Discovering Basic Blocks

And Instagram have their own CPython fork called Cinder - https://github.com/facebookincubator/cinder

comment by jstx1 · 2022-01-23 · in Faster CPython (2021) [pdf]

Exactly. Facebook literally maintains a python fork: https://github.com/facebookincubator/cinder Google invented "NoSQL" before anyone else knew what it was, and all those "cloud" tools they used internally were obviously proprietary…

comment by hnfong · 2021-11-05 · in An oral history of Bank Python

Cinder ( https://github.com/facebookincubator/cinder ) has Static Python bundled with it, which is pretty useful for replacing Cython. [disclaimer: I work on Cinder]

comment by tekknolagi · 2021-10-07 · in Faster Python with Guido van Rossum

…is actually 100% compatible with C extensions (by virtue of being a fork of CPython). [1]: https://github.com/facebookincubator/cinder

comment by czardoz · 2021-10-07 · in Faster Python with Guido van Rossum

…. Instagram is working on a performance-oriented CPython fork https://github.com/facebookincubator/cinder . Twitter, from what I understand, went back to Java, going through Scala first (which is another example of "bett

comment by Zababa · 2021-08-30 · in In Go, pointers (mostly) don't go with slices in practice

…Or Cinder [1] which was started by Facebook. Or PyPy [2]. [0] https://github.com/pyston/pyston [1] https://github.com/facebookincubator/cinder [2] https://www.pypy.org/

comment by karlding · 2021-07-18 · in Fullstaq Ruby: Ruby, optimized for production

…the work done as part of https://blog.pyston.org/2020/10/28/pyston-v2-20-faster-pytho... or https://github.com/facebookincubator/cinder ?

comment by ForHackernews · 2021-05-13 · in Faster CPython Ideas – Issue Tracker for Faster CPython Project

…a lot. It is neither Python or C and I am happy with that. use proper tool for the job at hand e to https://github.com/facebookincubator/cinder reply

comment by ThinkBeat · 2021-05-06 · in Pyston v2.2: faster and open source

…interesting to see how all these things play out in time. [0] https://blog.pyston.org/2014/09/ [1] https://github.com/facebookincubator/cinder

comment by dr_zoidberg · 2021-05-06 · in Pyston v2.2: faster and open source

How does this compare to https://github.com/facebookincubator/cinder

comment by akmittal · 2021-05-06 · in Pyston v2.2: faster and open source

> correction: the documentation does mention the lock: https://github.com/facebookincubator/cinder/blob/f60897df9f6 ... That's unchanged from the upstream CPython repo.

comment by gsnedders · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

We need some benchmarks to validate these bold claims. Edit: found them at https://github.com/facebookincubator/cinder/blob/cinder/3.8/...

comment by AbuAssar · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

…offer any improvements in terms of locking/GIL ? I didn't see any mention in the documentation. https://github.com/facebookincubator/cinder/search?q=gil correction: the documentation does mention the lock:…

comment by MichaelMoser123 · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

…be fairly generic. Did they need to change Django to better benefit from Cinder? Edit: intriguing… https://github.com/facebookincubator/cinder/blob/f60897df9f6...

comment by jarpineh · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

…pages via refcount changes. Here's the BPO issue [1] that tracks the upstreaming attempt. [0] https://github.com/facebookincubator/cinder/blob/9de726349eb... [1] https://bugs.python.org/issue40255

comment by karlding · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

Benchmarks: https://github.com/facebookincubator/cinder/blob/cinder/3.8/... There are some perf hits, as well as all the improvements.

comment by IceWreck · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

…2004 Steps to Reproduce Install docker from docker.com docker run -t -i fedora:32 bash git clone https://github.com/facebookincubator/cinder.git yum install zlib-devel openssl-devel ./configure make make altinstall This error is occurs…

comment by brian_herman · 2021-05-05 · in Cinder: Instagram's performance-oriented fork of CPython

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Cinder: Instagram's performance-oriented fork of CPython

story by yagizdegirmenci · 2021-05-04 · 261 comments