via wptavern.com => original post link
Gijo Varghese, a developer who calls himself a “web performance enthusiast,” shocked WordPress users around the world over the weekend when he tweeted a screenshot of how WP-Optimize is explicitly preventing select JavaScript files from loading when users test their sites through popular performance testing tools.
“When a site is loaded, the JavaScript files are loaded only when the user-agent/browser is not Lighthouse/GTmetrix/Headless Chrome/Pingdom,” Varghese said. “No JS = high scores. But for real users, these JS files are loaded!”