If you use the Panels module on your website and you’re not making big changes to panes, you can cache Panel pages in their entirety. To do this:
http://[site_URL]/admin/structure/pages for Drupal 7.Near the top of the pane, click the Display Settings link. A menu opens where you can change your page cache settings.
Although individual Panel panes aren’t cached by default, you can cache them as well.
To cache Panels panes:
In the menu’s Caching section, click Change.
You should cache any pane that doesn’t need to be updated frequently.
Be careful when you’re using Views and Panel caching at the same time. Users can be confused when one cache is cleared and items on a page don’t change because the other cache hasn’t cleared.
Several modules can help with additional caching for Panels. The Panels Hash Cache module provides a hash-based cache for Panels. In addition, the Cache actions module provides integration with the Rules module, allowing the cache to be cleared on specific triggers.
For more information about caching on your Drupal website, see Caching overview.
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