Implementation of 'Critical CSS' - it's not as simple as you think

The article 'Critical CSS Not So Fast' by Harry Robbins dives deep into the concept of critical CSS and the challenges it presents. Critical CSS is an optimization technique for the loading of web pages, involving the extraction of essential CSS styles needed for the initial rendering of the page. Robbins emphasizes that, despite its many advantages, implementing this technique is not as straightforward as it may appear. There are several technical aspects that can impact performance, including the time taken to generate the critical CSS and its effect on the page's rendering speed. The author advises caution and careful planning to avoid pitfalls associated with overly quick loading times. Additionally, the article encourages the practice of testing and monitoring results to ensure that adopted techniques deliver the desired outcomes.