Configure Nginx FastCGI cache to serve WordPress pages without PHP
Set up Nginx FastCGI page caching for WordPress so anonymous page views are served directly from disk without hitting PHP-FPM or MySQL, dramatically reducing server load.
Lazy load images and iframes in WordPress without a plugin
Use the native loading="lazy" attribute, WordPress filter hooks, and a lightweight Intersection Observer fallback to lazy load all images and iframes on a WordPress site.
Debounce and throttle explained with WordPress search and scroll example ...
Implement debounce for live search inputs and throttle for scroll and resize handlers in WordPress themes to prevent excessive function calls and improve performance.
Enable and analyse the MySQL slow query log on a WordPress server
Turn on the MySQL slow query log, set the right threshold, and use mysqldumpslow and pt-query-digest to find and fix the queries slowing down WordPress.
Monitor WordPress server resources with htop vmstat and iostat
Use htop, vmstat, and iostat to identify CPU, RAM, and disk I/O bottlenecks on a WordPress VPS before they cause downtime or slow page loads.
MySQL indexes explained with WordPress query optimisation examples
Understand how MySQL indexes work and learn to add the right indexes to WordPress custom tables and meta queries to eliminate slow full-table scans.
Compress and optimise WordPress images with Linux command-line tools
Use jpegoptim, optipng, pngquant and cwebp to bulk-compress WordPress uploads on a Linux VPS and automate optimisation with cron.
Throttle and debounce scroll and resize events in JavaScript
Implement throttle and debounce utilities to limit how often scroll and resize JavaScript event handlers fire in WordPress themes.
Reduce WordPress Heartbeat API frequency to lower server load
Slow down or disable the WordPress Heartbeat API with heartbeat_settings filter to reduce constant admin-ajax.php requests on shared hosting.