I've been doing some testing recently and have found that users with less permissions in Sage are experiencing slower performance.

To recreate this User A is assigned Administrator role within Sage.

and

User B is assigned a custom Parts Dept role.This role provides Full Access to My Dashboard, Customer_Sales, Inventory_Services. No access to Employees_Payroll & Banking_General Ledger. Custom access to Vendors_Purchases & Company.

The custom access on Vendors_Purchases is Full Access except no Access on Tasks/Payments/Write Checks & Tasks/Void AP Checks.

The custom access on Company is No Access except Full Access on Maintenance/Jobs, Tasks/Action Items, Tasks/Transactions in Prior Periods, Tasks/Find Transactions, Tasks/Post, Tasks/Un-Post, Tasks/Purge, Tasks/Time and Expense Tickets, Tasks/SDK Data Access, Reports/Audit Trail, Reports/Find Transactions, Reports/Jobs, Reports/Time and Expense, Reports/ReportGroups. Maintenance/User Login Manager is set to View Only. 

With the above role settings User B experiences slower loading times for inventory list, item costing report, inventory valuation reports, etc. I am looking for a solution to this issue.