SSRS parameters work best with selective defaults, compact value lists, and SQL queries that preserve useful indexes under real filters.
Multi-Value Report Parameters in T-SQL Without Dynamic SQL
A report that sends 1, 2, 2, 3 does not need dynamic SQL. Here is how to split, validate and match the list safely.
Report Caching and Snapshots in SSRS
Report caching and snapshots in SSRS reduce repeated database work when freshness rules, parameter combinations, and schedules are clear.