ABAP Keyword Documentation → ABAP − Reference → Processing Internal Data → Assignments → Assignment and Conversion Rules
Conversions - Performance Notes
Conversions in assignments between data objects with different data types, or specifying a data object in an operand position where a different data type is expected, produce runtime costs. To avoid these costs, conversions should be avoided where possible and only data objects of the same type should be assigned to one another.
Other versions: 7.31 | 7.40 | 7.54