[charcircuit]

Meta never abandoned jemalloc. https://github.com/facebook/jemalloc remained public the entire time. It's my understanding that Jason Evans, the creator of jemalloc, had ownership over the jemalloc/jemalloc repo which is why that one stopped being updated after he left.

[kstrauser]

The repo's availability isn't related to whether it's still maintained.

[charcircuit]

Meta still maintained it and actively pushed commits to it fixing bugs and adding improvements. From this blog post it sounds like they are increasing investment into it along with resurrecting the original repo. When the repo was archived Meta said that development on jemalloc would be focused towards Meta's own goals and needs as opposed to the larger ecosystem.

[kstrauser]

I'm not directly involved enough to dig into the details here, but facebook/jemalloc currently says:

> This branch is 71 commits ahead of and 70 commits behind jemalloc/jemalloc:dev.

It looks like both have been independently updated.

[Xylakant]

This looks a lot as if the facebook/jemalloc repo inserted a single commit 70 commits ago and then rebased the changes in the original repo on top. Because the commit SHAs for the changes pulled in change you see this result.

[masklinn]

The team probably sync'd the two after unarchiving the original.