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> I don’t want to dwell on drama, but it is perhaps worth mentioning that we reached a sad end for jemalloc in the hands of Facebook/Meta even though most of the people involved were acting in good faith.

Far from the only case. Trillion dollar companies having sudden interest in your open source project is not necessarily a long term benefit.

I thought it was developed internally there

but then we can't make it all about ripping on big companies

And some additional context from a few months ago, building off the postmortem.

https://theconsensus.dev/p/2026/04/16/who-even-uses-jemalloc...

Also, 7 months ago, https://github.com/facebook/jemalloc said

> Development of Jemalloc will transition back to the original open source project: https://github.com/jemalloc/jemalloc. Meta’s fork of the Jemalloc project will be fully archived as part of the transition. We look forward to continuing the collaboration with the community to drive jemalloc.

> See blog post for details: https://engineering.fb.com/2026/03/02/data-infrastructure/in...

Post-ZIRP reality of corporate self-interest being re-established.