SharePoint Online List performance issue, when i click on new item or new form i face delay in opening new form. I was wondering how improve the performance of the list library. I have more than 1k items in this list.

  • Are you using the classic or modern list experience? Feb 9 '21 at 15:57
  • Modern list experience
    – striker92
    Feb 9 '21 at 16:35
  • Does the new form appear as a dialog from the right or does it open a new page? Feb 9 '21 at 16:37
  • Dialog appears from right
    – striker92
    Feb 9 '21 at 16:45

For list performance, common steps are like below, have a try:

  1. Add indexes on columns.
  2. Edit the view and apply filters. Make sure only a portion of items will get diplayed under the current view.

Reference: https://support.microsoft.com/en-us/office/manage-large-lists-and-libraries-b8588dae-9387-48c2-9248-c24122f07c59

And commonly 1k items shall not have sever performance issue which will cause delay on opening new form. Are you using a heavily customized list form? Or you have a huge number of columns?

  • I had checked i have 20+ columns but items are more than 5k i guess. And not customized form we are using default form.
    – striker92
    Feb 10 '21 at 14:16
  • @striker92, that sounds much more reasonable. As you are exceeding the list view threshold, just try the suggestions and check the performance again. And too many item-level unique permission will also cause a performance issue. Have a check
    – Jerry_MSFT
    Feb 15 '21 at 9:31

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