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Marcin Dudek

Senior WordPress Developer with 15+ years of experience. Building and fixing WordPress since 2010. Creator of WP Multi Tool and fix-wp.com. 130+ projects completed across shared hosting, VPS, and enterprise infrastructure.

How Many Plugins Can WordPress Handle? I Installed 223 to Find Out

June 11, 2026 by Marcin Dudek
Four panels showing TTFB, DB queries, files loaded and peak RAM climbing as WordPress plugin count goes from 0 to 223

I installed 223 plugins on a 256MB WordPress box. RAM held, queries exploded 23x, one plugin killed the site – real benchmark data inside.

Categories Guides, Performance Optimization

Do Too Many Plugins Slow Down WordPress? I Benchmarked 55,000 to Find Out.

June 11, 2026June 7, 2026 by Marcin Dudek
Bar chart: 90.8% of WordPress plugins add 10ms or less to homepage load time; a tiny tail exceeds 100ms

Every WordPress speed tip says cut your plugins. I benchmarked 55,202. The median adds 0ms to your homepage. Here’s what actually slows a site.

Categories Guides, Performance Optimization

I Tried to Run Every Plugin on WordPress.org. 1 in 16 Wouldn’t Even Start.

June 7, 2026June 3, 2026 by Marcin Dudek
Bar chart: why roughly 3,300 WordPress.org plugins would not start, by failure category

I activated 54,649 WordPress.org plugins in clean containers. ~94% ran fine. What the other 6% got wrong — and how to spot them first.

Categories Guides, Troubleshooting

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

June 11, 2026April 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

June 1, 2026March 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
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