When using the Timelines Tab to monitor website performance, the performance is so poor that it effectively makes the tool unusable. Steps to reproduce: 1) Navigate to https://www.bieseckerart.com/gallery 2) Start an Events recording 3) Hover over some of the images and click on them to open the image modal 4) Close the modal and repeat Expected Result: The timeline view continues to remain responsive and can easily be stopped, started, etc. Observed Result: The web inspector, and the rest of the page, becomes extremely unresponsive very quickly.