Auto Translation Property will impact the systeam performance in consoladation?

If you are referring to the Auto Translation Currencies in the Entity dimension, then, yes that property can affect performance.  Translation to additional currencies mean additional Translation rows need to be computed, and more rows need to be stored in the cube, both of which can affect Consolidation times, and secondarily affect reporting performance.  With small amounts of data, it might be immaterial.  With larger amounts of data, I guess you need to determine if the business need justifies the cost.