title: Wordpress: how to know which page is requesting a specific css file
body: <p>I am helping out a friend with a slow WP. I installed hummingbird and it's telling me that some css files are slow to load (for example: <a href="https://cdnjs.cloudflare.com/ajax/libs/gsap/1.11.2/TweenMax.min.js" rel="nofollow noreferrer">https://cdnjs.cloudflare.com/ajax/libs/gsap/1.11.2/TweenMax.min.js</a> - it takes 390ms to load). I would like to store this file locally and see if the performance improves. The problems is that I'm not sure about how to locate the file that is actually requesting this css file. Any help is appreciated.</p>