RE: Complier is not recognize CALLP with procptr array

[Scott Klement <klemscot@xxxxxxxxxxxx>]

On Thu, 29 May 2003, Lim Hock-Chai wrote:
>
> Question:  If those procedures are all in-line procedures.  Would this
> dynamic call cause performance issue?
>

To me, a dynamic call is one where the address of the procedure isn't
known when the you call it the first time.  For example, when you call a
separate program, the library & object name are used to search the
system for the program.   Then, the program might have to be activated.
Finally, you can get the address of the code, and run it.  (This is, of
course, all done for you under the covers)

Whereas, in your case, the procedure was loaded when the program was
loaded, since it's inside the program itself.   The address is already
known (since that's what you're using to call it!) so it doesn't have to do
any kind of searching....  it just runs the code at that address in
memory.

So... I would not consider what you're doing a dynamic call.  It should
perform exactly the same as calling the procedure directly.   The only
extra time would be the time it takes to copy the pointer from the
data structure to the pointer in your prototype.   But, the time it takes
to copy 16 bytes is insignificant, even on older, slower, computers.