Collections.Pooled (nuget): Includes PooledList, PooledDictionary, PooledSet, PooledStack, and PooledQueue: based on the corresponding collections in System.Collections.Generic, but using ArrayPool internally to reduce allocations, and with some API changes that allow for better compatibility with Span.
Keywords: List|ArrayPool|Span|Dictionary|Stack|Set|HashSet|arraypool|dictionary|hashset|list|queue|span|stack