Hi, @Pall Piars
Thank you for posting in Microsoft Q&A forum.
The slow console performance may caused by Database Cardinality Estimation (CE) Issues, changes in SQL Server CE in versions like SQL Server 2014, 2016, and 2017 can lead to performance issues with certain queries. It may be beneficial to check the compatibility level of the site database and adjust it if necessary.
For your reference:
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Add comment".