Caching

WordPress discards its internal object cache after every request by default. A persistent object cache keeps that data in memory between requests, reducing database queries. Learn when it matters and…

Caching plugins are the most common WordPress performance tool, but they cannot fix every performance problem. Learn what caching actually solves and where its limits are.

Cache invalidation determines when cached content is refreshed. Learn why overly aggressive or overly conservative invalidation causes performance and freshness problems.

WooCommerce loads a cart fragment script on every page to update the cart icon count. Learn why this AJAX request affects every page load and what it means for performance.

Cache hit ratio measures how often requests are served from cache vs rebuilt from scratch. Learn what a healthy ratio looks like and why a low ratio means your caching…

Object caching stores frequently used database results in memory so WordPress does not have to query the database repeatedly. Learn how Redis and Memcached reduce database load.

Browser caching tells returning visitors’ browsers to reuse files they already downloaded. Learn how cache headers work and how they speed up repeat visits.

Page caching stores a ready-made copy of your pages so WordPress does not have to rebuild them for every visitor. Learn how page caching works and why it dramatically improves…

WooCommerce dynamic cart sessions prevent most caching plugins from serving cached pages to logged-in users. Learn why WooCommerce sites have unique caching challenges.