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pjmlptoday at 10:53 AM1 replyview on HN

And use-after-free, when that arena's memory goes away.


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prontoday at 12:58 PM

But arenas have substantial benefits. They may be one of the few remaining reasons to use a low-level (or "systems programming") language in the first place. Most things are tradeoffs, and the question isn't what you're giving up, but whether you're getting the most for what you're paying.

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