Solving the C10K problem with Linux + Apache + MariaDB + PHP + WordPress.

Just went through several days of tuning a new client's site running 50K-100K page requests/hour. Insane levels of traffic.

This surfaced problems in PHP + WP Super Cache. Bugs opened in both projects showing how to reproduce problem.

After all's said + done, site can now handle 10M visits in 9minutes. You read that number correctly. 1M+ reqs/sec sustained traffic out of WordPress.

So when someone tells you WordPress is slow, they're wrong.

What they should say is, something... somewhere... in the configuration of their entire LAMP Stack + WordPress setup is slow + likely fixing some minor setting somewhere will heal their site to run massive traffic.