Learn to cache, block, defer, and tune outgoing WordPress HTTP requests using transients, the pre_http_request filter, timeout configuration, and WP-Cron async patterns.
The WordPress Heartbeat API fires AJAX requests every 15 seconds by default, hammering your server even on pages that don’t need it. Learn to disable it on the frontend, reduce frequency on the editor, and tune autosave intervals using filters and constants – no plugins required.
