Performance & caching
Page cache, object cache, images and finding out why a site is slow.
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All articles in this category
How caching works on the platformFour caches sit between a visitor and your database. Knowing which is which explains most surprises.
20 Sep 2026
Clear the cachePurge the right layer rather than all of them, and know what a full purge costs.
20 Sep 2026
Diagnose a slow siteSeparate a slow server from a slow page, then find the plugin or query responsible.
20 Sep 2026
Serve images efficientlyImages are most of the weight of most pages. Four changes fix most of it.
20 Sep 2026
Prepare for a traffic spikeA campaign, a sale or a news mention. What to check in the week before.
20 Sep 2026
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