Why “Arenas” is being discussed
The most recent Hacker News stories and comments contributing to this topic's mentions.
The C3 temp allocator leans into this though. It’s not a frame allocator but acts like a stack allocator. It solves the ”oh, how do you make sure the data you got back is proper…
by lerno · Sep 22, 2026
> Arenas make lots of sense for video games, but their applicability for these other applications is much more dubious. It's a fairly common pattern in non-video contexts to pre…
by zbentley · Sep 20, 2026
> i find it fascinating how big of a rust hater you are. willing to outright lie to make your point.. because you can do this with_allocator You say I outright lie for not menti…
by pron · Sep 20, 2026
They don't play nicely with arena allocators. And arenas is what you reach for if you have clear lifetime bounds: e.g. a single request with arena never de-allocates individual…
by delamon · Sep 20, 2026
I don't know exactly how specific you want to be, but sure, because we've come across this countless times in C++, which suffers from the exact same problem. Suppose you're writ…
by pron · Sep 19, 2026
I meant to suggest using arena allocation for everything and not even using a malloc style allocator. Just getting memory via memmap at program start and then using arenas for e…
by ozgrakkurt · Sep 19, 2026
Interest
Proportion of Hacker News items mentioning "arenas" over time.
Mentions
Total number of Hacker News items mentioning "arenas" over time.
Arenas may refer to: Read more on Wikipedia