[anonymoushn]

I think this comment assumes that you're using one allocator, but it's probably normal in Zig to use one allocator for your caches, and another allocator for your per-request state, with one instance of the latter sort of allocator for each execution context that handles requests (probably coroutines). So you can just have both, and the stuff that can go in the bump allocator does, and concurrent requests don't step on each others toes.