A high-performance slab allocator using hierarchical bitmaps for O(1) operations.
use hislab::HiSlab; let mut slab = HiSlab::new(); let idx = slab.insert(42); assert_eq!(slab[idx], 42); let val = slab.remove(idx); assert_eq!(val, Some(42)); assert!(slab.get(idx).is_none());