Rule Definition
The possible forms of parameter transfer in ABAP are pass by reference (indicated by Reference(PARAM) or not at all) and pass by value (indicated by Value(PARAM) ). The general rule is that pass by value is always slower than pass by reference. The loss in performance is always a minimum of 40 % and can rise to several 1000 %, depending on the data type and data volume.

Remediation
Try to avoid passing parameter by value as much as possible.

Violation Code Sample

DATA: BEGIN OF X.
INCLUDE STRUCTURE SFLIGHT.
DATA: ADDITION(8) TYPE C,
END OF X.
...
PERFORM U USING X.
...
FORM U USING VALUE(X) STRUCTURE SFLIGHT.
WRITE: X-FLDATE.
ENDFORM.

Fixed Code Sample

DATA: BEGIN OF X.
INCLUDE STRUCTURE SFLIGHT.
DATA: ADDITION(8) TYPE C,
END OF X.
...
PERFORM U USING X.
...
FORM U USING X STRUCTURE SFLIGHT.
WRITE: X-FLDATE.
ENDFORM.