By Addy Osmani CHAPTER 6Show Reasons for Compositing
- Grab the WebKit nightlies.^20
- Make sure to switch off “Use WebKit Web Inspector.”
- Hit that shiny “Layers” button. Boom!
- Reasons for layer promotion are displayed on hover.
The second is that you can display the number of times a layer was (re)
painted, helpful for understanding what parts of your page may be getting
excessively painted due to behavior in your scripts.
Show Paint Counts of layers
- Under Layers → Show composited layer borders.
- Like Chrome, it displays layers promoted to a composite layer.
- However, it also displays the number of times a layer was painted!