class RSpec::Core::FilterableItemRepository::UpdateOptimized

This implementation is simple, and is optimized for frequent updates but rare queries. ‘append` and `prepend` do no extra processing, and no internal memoization is done, since this is not optimized for queries.

This is ideal for use by a example or example group, which may be updated multiple times with globally configured hooks, etc, but will not be queried frequently by other examples or example groups. @private