- Type chrome://flags into your browser
- Scroll down to “Enable Developer Tools experiments” and click enable
- Restart Chrome
- Open up DevTools
- Click on the gear icon — it’s typically on the top right or bottom right
- Select experiments from the menu on the left
- Hit shift 6 times to show hidden experiments
- Enable 'V8 Runtime Call Stats on Timeline'
We are hoping to turn this feature on by default soon so the above steps are not needed.