Computer Configuration > Administrative Templates > Microsoft Edge > Performance
Both
HKLM\Software\Policies\Microsoft\Edge
The performance detector detects tab performance issues and recommends actions to fix the performance issues. If you enable or don't configure this policy, performance detector is turned on. If you disable this policy, performance detector is turned off. The user can configure its behavior in edge://settings/system. Learn more about performance detector: https://aka.ms/EdgePerformanceDetector