Marcin Dudek WordPress shortcodes have been around since version 2.5. They’re everywhere — page builders use them, contact form plugins use them, even some themes rely on them for basic layout. But do they actually slow down your site? The short answer: shortcodes themselves are nearly free. What’s expensive is the code they execute. Let me show … Read more
Hotjar is one of the most popular behavior analytics tools for WordPress. Heatmaps, session recordings, feedback polls — it gives you visibility into how users actually interact with your site. But every third-party script has a cost, and Hotjar is no exception. Here’s what Hotjar actually loads, how much it impacts performance, and what you … Read more
XML-RPC is a remote procedure call protocol that WordPress has supported since before the REST API existed. It allows external applications to communicate with your WordPress site — but in 2026, it is mostly a liability. What XML-RPC Does XML-RPC (xmlrpc.php) enables remote publishing, pingbacks, and trackbacks. Desktop blogging apps and some mobile apps used … Read more
A fresh WordPress database is a few megabytes. After a year of running, it can balloon to hundreds of megabytes — even gigabytes — of accumulated junk. Post revisions, expired transients, spam comments, and orphaned metadata silently slow down every query. The Hidden Cost of Database Bloat Every database query scans through or indexes this … Read more
You click “Update” in your WordPress dashboard and hold your breath. Sometimes the update completes smoothly. Sometimes you get the white screen of death. WordPress updates — whether core, plugin, or theme — are the single most common cause of unexpected site crashes. Why Updates Break Things PHP Version Incompatibility A plugin updates to use … Read more
The wp-config.php file is the control center of your WordPress installation. Most tutorials only cover database credentials, but this file holds the keys to significant performance improvements. Memory Limits WP_MEMORY_LIMIT applies to frontend requests. WP_MAX_MEMORY_LIMIT applies to admin tasks like updates and image processing. Set these based on your server capacity — going too high … Read more
You install a new plugin and suddenly your contact form stops working. Or you update an existing plugin and your site throws a fatal error. Plugin conflicts are one of the most common WordPress problems, and they get more likely as your plugin count grows. Why Plugins Conflict WordPress plugins share a global environment. They … Read more
Render-blocking JavaScript is one of the most common performance issues flagged by PageSpeed Insights and Core Web Vitals. When a browser encounters a script tag, it stops rendering the page until that script is downloaded and executed. Deferring scripts tells the browser to continue rendering while downloading scripts in the background. defer vs async: Know … Read more
The 500 Internal Server Error is the most generic and frustrating error in WordPress. It tells you something went wrong, but not what. Here is a systematic approach to track it down and fix it. Check the Error Log First Before trying random fixes, look at your server error log. The 500 error is a … Read more
Your frontend loads in 2 seconds, but wp-admin takes 8. Sound familiar? A slow WordPress dashboard is not just annoying — it kills productivity. Every click, every save, every page load in the admin drags you down. The Admin Is a Different Beast Most caching solutions only help the frontend. Your admin dashboard runs uncached, … Read more