Performance issue

Former Member — Fri, 02 Jan 2009 06:23:48 GMT

Hi,

Which one give the better performance Macros or Subrountines.

Regards,

Suresh

Re: Performance issue

Former Member — Fri, 02 Jan 2009 06:26:04 GMT

hi,

Both are one and the Same. Only difference is You cannot debbug the Macro.

Re: Performance issue

Former Member — Fri, 02 Jan 2009 06:28:24 GMT

Macros can only be used in the program the are defined in and only after the definition.

Macros can take max 9 parameters.

Macros are expanded at compilation / generation.

Subroutines (FORM) can be called from both the program the are defined in and other programs ('perform

' of 'perform in program ').

Subroutines can take any amount of parameters.

Subroutines are 'expanded' at runtime.

In general:

A MACRO is more or less an abbreviation for some lines of code that are used more than once or twice.

A FORM is a local subroutine (which can be called external).

A FUNCTION is (more or less) a subroutine that is called external.

Since debugging a MACRO is not really possible, prevent the use of them (I've never used them, but seen them in action). If the subroutine is used only local (called internal) use a FORM. If the subroutine is called external (used by more than one program) use a FUNCTION.

there shud be no difference performance wise. use it the way prefred according to your req with the difference stated above

reg

Ramya

Edited by: Ramya S on Jan 2, 2009 7:29 AM

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