This is pure gold: What rendering really means for SEO by @geekonaut
Key highlights:
- Google doesn't care about pixels: What matters it's what's in the DOM.
- The Web Rendering System (WRS) is responsible for getting the HTML and resources and building the DOM.
- The rendering process happens whether your website uses JavaScript or not.
- At the median, a page's rendering is queued for 5 seconds.
Thanks, Martin, for shedding some light on this topic!
