sefer-alloc vs arena-lib vs arena-b

A safe-by-construction, 100% Rust memory toolkit (no C/C++ libraries — no libnuma/mimalloc/jemalloc/snmalloc/tcmalloc): a single-threaded handle store (Region<T>) and a drop-in #[global_allocator] (SeferAlloc) over one verified segment substrate, with #![forbid(unsafe_code)] at the top.

Typed memory arena and slab allocator library. Generational indices, typed arenas (one allocation per type), interned strings, and bump allocation. Zero unsafe leakage into user code.

Production-grade bump allocator with lock-free, slab, and virtual-memory tooling for parsers, game engines, and request-scoped services