Try to resize the window's width to than 800px then reload to see how the Render Blocking CSS affects rendering.
The current width is:
DOMContentLoaded: ......
Window Loaded: ......
CSS blocked first render: ......
NOT BLOCK by CSS | BLOCK by CSS | |
---|---|---|
The time to first paint (first render) | ||
The time to first-contentful-paint |
- Open browser devtool
- Switch to Network tab and select Disable cache
- Switch to Perfomance tab
- Throttle the network to Slow 3G and change CPU to 6x slowdown