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Asset optimization in WordPress 6.8+ reduces page weight by loading scripts and styles only when their corresponding blocks appear on the page. Enable on-demand loading through the should_load_block_assets_on_demand filter to conditionally enqueue assets per-page, eliminating unnecessary downloads and speeding up initial render.

Speculative loading uses browser speculation rules to prefetch or prerender anticipated pages before users navigate to them. WordPress 6.8+ implements this via wp_speculation_rules and wp_load_speculation_rules hooks, dramatically reducing perceived load times by preloading critical resources and content in advance.

Yes. Transients store expensive query results temporarily, and object caching reduces repeated database hits. Both strategies lower database load and boost responsiveness, particularly for product pages and content-heavy sites. Implement transient storage via WordPress caching API to cache product data and derived results.

Register conditional asset loading for custom blocks by hooking into should_load_block_assets_on_demand and wp_enqueue_scripts. Use block detection logic to load scripts and styles only when the block is present, reducing initial page weight and improving performance across your site.

Yes. On-demand asset loading integrates with admin_init for backend optimization and supports AJAX handlers secured with nonce checks. Activation and deactivation hooks ensure clean setup and teardown, making the approach compatible with administrative interfaces and dynamic content loading.

WordPress 6.8 or later is required. This version introduced native support for on-demand block assets, speculation rules, and integrated caching mechanisms. Older versions lack these features, so upgrading ensures access to the latest performance optimization tools and best practices.