Speed up a website twice

In this video I’ll show how to apply Google PageSpeed Insights’s recommendations and accelerate a website significantly. The main points are: 1. Prepare optimised CSS and JavaScript files for each template via gulp. 2. Divide CSS into critical and non-critical parts. Insert the critical part right into a HTML-document’s body. 3. Set generation of images for different browsers and devices. Use HTML tags “picture“ and “source“. 4. Introduce images’ lazy loading. There are links form the video there: There