Crate cranelift_bforest

A forest of B+-trees.

This crate provides a data structures representing a set of small ordered sets or maps. It is implemented as a forest of B+-trees all allocating nodes out of the same pool.

These are not general purpose data structures that are somehow magically faster that the standard library’s BTreeSet and BTreeMap types.

The tradeoffs are different:

• Keys and values are expected to be small and copyable. We optimize for 32-bit types.
• A comparator object is used to compare keys, allowing smaller “context free” keys.
• Empty trees have a very small 32-bit footprint.
• All the trees in a forest can be cleared in constant time.

Structs

• Map
  B-tree mapping from K to V.
• MapCursor
  A position in a Map used to navigate and modify the ordered map.
• MapForest
  Memory pool for a forest of Map instances.
• MapIter
  An iterator visiting the key-value pairs of a Map.
• Set
  B-tree representing an ordered set of Ks using C for comparing elements.
• SetCursor
  A position in a Set used to navigate and modify the ordered set.
• SetForest
  Memory pool for a forest of Set instances.
• SetIter
  An iterator visiting the elements of a Set.

Traits

• Comparator
  Key comparator.