Experience slow load times on form records that contain activity stream on the formIssue If there are too many fields configured to be displayed in the Activity Stream Filter, this can cause the page to render slowly in the browser. Specific example: On the list view of our records, things load, and we can view our tickets just fine, but starting roughly two months ago, whenever we click into a specific ticket to view or edit it, we experience slow load times—usually around 15-20 seconds to load the record and another 30 seconds to be able to edit any field. We were able to isolate that when the activity stream is removed from the form, the record will load quickly, but on views with the activity stream present, it will take a long time to load. There are no errors found in the console, node logs, or network logs. The transactions do not show any slow queries. The slowness seems to be present mostly on the client side as if it was taking time for some script to finish loading. When using the Chrome browser, the UI may display the message "The following page has become unresponsive. You can wait for it to become responsive or kill it". NOTE: When looking at the issue with Chrome Developer tools enabled and looking at the network trace, we could see that the page would seemingly finish loading, but the form would still be unresponsive, meaning that the mouse icon would not respond to anything on the form until whatever finishes "loading" is done. So if I were to hover over a reference icon, it should turn into a pointing finger, but in the above scenario, it will continue to be a mouse cursor.SymptomsSlow load times are seen when loading a form record when the activity stream is present on the viewReleaseReproduced on YokohamaCauseThe issue is related to the activity stream having too many columns loaded (13MB worth of columns). Clicking the filter icon for the activity stream would cause it to take some time before it finished loading ResolutionOn the affected form records, click on the Filter Activity filter icon and scroll to the bottom to find the "Configure available fields" In the slush bucket in the right "Selected" column, remove fields that are not required to display in the activities stream and click Save.