We are consistently seeing slow performance and most of the time experiencing "Page Unresponsive" when loading large diagrams in Web Portal,
Please make sure:
Please ensure you're running the latest version of Chrome by checking for available updates here and if necessary, update your Chrome.
Try using incognito mode and see if the issue persists. If incognito mode helps, one of your extensions could be the root cause of the problem. Disable Chrome extensions one by one by visiting chrome://extensions and uncheck Enabled for each extension.
One of our customers found out AppSense Cascade Extension is the one causing the problem