Symptoms
Assume that you upgrade from Microsoft SQL Server 2016 to SQL Server 2017 on windows. When you run a query that contains HASHBYTES function in SQL Server 2017, you may notice that the server performance will become slow when compared to SQL Server 2016.
Resolution
This issue is fixed in the following cumulative update for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminologythat Microsoft uses to describe software updates.