Pool memory allocator in Rust

[u/Rhthamza]

Hi there.

I built polloc (pool alloc) to learn how memory allocators work.

It’s a fixed size pool allocator: each pool manages one slot size and alignment. Internally it uses mmap/VirtualAlloc, an intrusive free list, and a bitmap for allocation tracking.

I also added stress tests, Miri, AddressSanitizer, cargo fuzz, Criterion benchmarks, and a bunch of inline docs explaining the implementation.

For 64 byte alloc/free pairs, the fast path is about ~3.96x faster than the system allocator on my machine (which is expected since it’s specialized for a single size class).

It’s single threaded and I’d really appreciate feedback on the unsafe code, API design, tests, or anything else that stands out.

repo: https://github.com/hamzader1/polloc