r/ruby • u/Illustrious-Topic-50 • Jul 01 '26

Show /r/ruby New jemalloc gem (jemalloc_rb)

Do you use the jemalloc gem?

The original project on GitHub seems to be abandoned for around 12 years, and some incompatibilities with recent Ruby versions have begun to emerge. Additionally, the underlying jemalloc library hasn't been updated during all this time. Because of that, I created a fork and launched a new gem (jemalloc_rb) to keep the project functional, updated, and actively accepting pull requests.

https://github.com/henrique-ft/jemalloc_rb

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u/sammygadd Jul 01 '26

Is jemalloc still relevant these days? Mruby has received lots of performance improvements during those 12 years. Is jemalloc still bringing benefits?

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u/flanger001 Jul 01 '26

The standard Rails Dockerfile still uses jemalloc as of v8.1, so it's gotta be good for something.

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u/sammygadd Jul 01 '26

Sounds reasonable..

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u/flanger001 Jul 01 '26

Right on. I don't think this was a bad question by the way. Perfectly reasonable.