In the admin area under Settings > System > Storefront, you can configure various options to improve the performance and user experience of the storefront.
Activate icon cache: The icon cache prevents duplicate SVG code in the HTML when the same icon is rendered multiple times on a page. It reuses the SVG code of the first found icon.
Compile theme in the background: The theme is compiled asynchronously in the background via the message queue. This can reduce the waiting time when saving the theme configuration. You’ll receive a notification once the compilation is complete.
Speculation rules API (Experimental): Used to improve performance for future navigations - for example, when switching from the listing to the detail page.