VuFind uses caching in several places to improve performance.

VuFind has a VuFind\Cache\Manager class which pre-configures Zend Framework cache objects and/or directory locations for several named caches. Each of these caches is used slightly differently.

• config - stores top-level Zend Framework configurations; manually set up in application.config.php but included in the cache manager to assist with automated cache clearing in the admin panel.
• cover - stores cover images; used by the cover loader to store downloaded image files.
• language - stores parsed i18n language files; set up as part of i18n initialization.
• object - stores serialized PHP objects; this is the most general-purpose cache in VuFind, shared by several different consumers. If you want to cache data of your own, this is a good place to put it, as long as you name your cache keys with appropriate uniqueness.
• searchspecs - stores parsed/processed YAML search specification configurations; used by the SearchSpecsReader.