Yet another thing to consider when evaluating site speed and performance: the rendering of cascading style sheets in the browser.

A lot of this is beyond my skill set if not my understanding. It’s a long post with a warning at the end:

Everything I have outlined above adheres to specs or known/expected behaviour, but, as always, test everything yourself. While it’s all theoretically true, things always work differently in practice. Test and measure.

The linked post has been selected, provisionally, as Cornerstone Content by The WordPress Curated Network.

Despite having been called CSS Wizardry for over a decade now, there hasn’t been a great deal of CSS-related content on this site for a while. Let me address that by combining my two favourite topics: CSS and performance. CSS is critical to rendering a page—a browser will not begin rendering until all CSS has been found, downloaded, and parsed—so it is imperative that we get it onto a user’s device as fast as we possibly can. Any delays on the Critical Path affect our Start Render and leave users looking at a […]


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