- Go to the page that you want to analyze.
- Click the Performance tab in DevTools.
- Click Record . Figure 1. Record, outlined in blue.
- Interact with the page. DevTools records all page activity that occurs as a result of your interactions.
- Click Record again or click Stop to stop recording.
For More Information Please Refer: https://developers.google.com/web/tools/chrome-devtools/evaluate-performance/reference