topic Re: Move-corresponding Doubt in Application Development and Automation Discussions

Move-corresponding Doubt

Former Member — Fri, 28 Sep 2007 20:46:30 GMT

Hello Experts,

I am having 10 fields in say structure s_struct1 and another structure is having 12 fields.

If i will use Move-corresponding from S_STRUCT1 TO S_STRUCT2.

insted of Move statetement 10 time for 10 different fields.

Which will take more time and how much more time?

Neno sec, Micro sec, Mili sec, Sec, mins etc.

Keep in Mind 10 move statements and 1 move-corresponding.

Target 10 field value move.

Regards,

Preeti Gupta

Message was edited by:

Preeti Gupta

Re: Move-corresponding Doubt

Former Member — Fri, 28 Sep 2007 20:52:30 GMT

Always do not use move-corresponding unless you have many fields from structure to other structure.

Move-corresponding will take more time than individual move statement

Thanks

Seshu

Re: Move-corresponding Doubt

Former Member — Fri, 28 Sep 2007 20:57:02 GMT

MOVE-CORRESPONDING takes a very slightly longer time to execute, but unless you're into extreme performance tuning, the effort is not worth the bother. See:

<a href="/people/rob.burbank/blog/2006/11/16/performance--what-will-kill-you-and-what-will-leave-you-with-only-a-flesh-wound">Performance - what will kill you and what will leave you with only a flesh wound</a>

Rob

Re: Move-corresponding Doubt

Former Member — Fri, 28 Sep 2007 21:03:21 GMT

How Much time. Be specific.

Re: Move-corresponding Doubt

Former Member — Fri, 28 Sep 2007 21:09:46 GMT

Check the BLOG - it's very specific. It measures run times for different performance techniques including this.

Rob

Re: Move-corresponding Doubt

Former Member — Mon, 01 Oct 2007 06:11:52 GMT

Nano sec in both the cases.

But time taken in move-corresponding is greater!

Cheers!

Re: Move-corresponding Doubt

Former Member — Mon, 01 Oct 2007 08:11:29 GMT

The MOVE-CORRESPONDING is not performance issue. It has a slight overhead against the specified moves, this should be clear, if you think about it.

The programmed moves specify something, which the MOVE-CORRESPONDING most find out.

Use MOVE-CORRESPONDING, if you structures can change, otherwise you get an error later or you must the program again.

Don't use MOVE-CORRESPONDING if your table is buffered, because the buffer select is so fast, that the MOVE-CORRESPONDING is in the same range.

But never forget, performance is determined by indexes, not by MOVE-CORRESPONDING!

Siegfried

Re: Move-corresponding Doubt

ThomasZloch — Mon, 01 Oct 2007 11:10:39 GMT

I have no doubts about "move-corresponding" at all, it allows for elegant and dynamic programming, nano seconds don't matter really in this case.

"move-corresponding" for president!