Performance question

Hi zenisekd, unless you are using DirectQuery, having a separate table won’t improve slicer speed.

The performance of a slicer is mainly affected by the cardinality (the number of unique values) in the column, not the total number of rows in the fact table. 

If there were additional attributes related to the "Product Code" (e.g., product name, category, price, etc.), then a dimension table would be beneficial for data modeling and easier filtering.