Materialize/doc/user/layouts/shortcodes/views-indexes/index-query-optimization-specific-instances.html

Specific instances where indexes can be useful to improve performance include:

- When used in ad-hoc queries.

- When used by multiple queries within the same cluster.

- When used to enable [delta
  joins](/transform-data/optimization/#optimize-multi-way-joins-with-delta-joins).

For more information, see [Optimization](/transform-data/optimization).