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WordPress Performance Blog

WordPress Security Plugins and Performance: The Hidden Trade-off

April 15, 2026 by Marcin Dudek

Security plugins hook into every WordPress request – firewall rules, file scanning, database logging. Here’s what each major plugin does under the hood, why some add serious overhead, and how to get proper security without killing your site speed.

Categories Performance Optimization

WordPress Multisite Performance: Scaling to 50+ Sites Without Dying

April 11, 2026 by Marcin Dudek

Running 20-100 client sites on WordPress multisite? Here is how the database architecture actually works, why switch_to_blog kills performance, and what to do about plugin activation scope, object caching, and domain mapping overhead.

Categories Guides

Object Cache in WordPress: Redis vs Memcached vs Nothing

April 8, 2026 by Marcin Dudek

What WordPress object cache actually does, when you need a persistent cache, Redis vs Memcached architectural differences, and how to verify it is working. No fabricated benchmarks.

Categories Database & Backend

WordPress REST API Performance: Disable What You Don’t Need

April 4, 2026 by Marcin Dudek

WordPress registers 40+ REST API endpoint controllers on every /wp-json/ request. Most sites use a fraction of them. Here’s how to audit, trim, and lock down your REST API – with real hooks and code you can deploy today.

Categories Performance Optimization

How to Find Which Plugin Is Slowing Down Your WordPress Site

April 1, 2026 by Marcin Dudek

Your WordPress site is slow and you suspect a plugin. Here’s how to actually find the culprit – from the manual disable-and-test method to hook profiling tools that show you exactly which callback is eating your page load time.

Categories Troubleshooting

WordPress Cron Jobs: The Silent Performance Killer Nobody Talks About

March 28, 2026 by Marcin Dudek

WP-Cron checks for scheduled tasks on every page load and makes an HTTP request to itself. Here’s why that causes random slowdowns and how to fix it in 5 minutes.

Categories Performance Optimization

MariaDB 10.11 vs 11.4 for WordPress: Should you update? YES! [Benchmark]

March 26, 2026 by Marcin Dudek

I benchmarked MariaDB 10.11 vs 11.4 on identical WordPress + WooCommerce environments. The results: 40x faster subquery updates, 8x faster date queries, and 4-10% faster page loads. Here are the real numbers.

Categories Performance

Best WooCommerce Configurator Plugins 2026 (Performance Tested)

March 25, 2026March 25, 2026 by Marcin Dudek

I installed 16 WooCommerce configurator plugins on a clean site and measured the real page weight impact. Some add zero overhead. One adds 860KB of JavaScript to every product page.

Categories Guides, Performance

WordPress Memory Limit: How to Find What’s Eating Your PHP Memory

March 25, 2026March 25, 2026 by Marcin Dudek

Every guide tells you to increase WP_MEMORY_LIMIT. None of them tell you how to find what’s actually eating your memory. Here’s a diagnostic workflow that gives you real answers.

Categories Performance Optimization

Emergency WordPress Recovery: What to Do When Your Site Goes Down

March 16, 2026 by Marcin Dudek

Your site is down. Visitors see an error page. Revenue is dropping by the minute. Panic sets in. Here is your emergency action plan — a calm, systematic approach to getting your WordPress site back online as fast as possible. Step 1: Confirm the Outage (30 seconds) Before doing anything, verify the site is actually … Read more

Categories Troubleshooting
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