RE: timings II. const varying vs value varying -- RPG400-L

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Subject: RE: timings II. const varying vs value varying
From: "Steve Richter" <srichter@xxxxxxxxxxxxx>
Date: Wed, 9 Oct 2002 17:25:29 -0400
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-----Original Message-----
From: rpg400-l-admin@midrange.com [mailto:rpg400-l-admin@midrange.com]On
Behalf Of Scott Klement
Sent: Wednesday, October 09, 2002 12:09 AM
To: chat. Rpg400-L
Subject: Re: timings II. const varying vs value varying

>However, when something is passed "value" it has to make a copy of the
>entire variable.

>So, logically, it will take longer to pass something large by value
>than it would by const.   i.e. copyying 16 bytes is faster than copying
>32,000.

 d  sText1         d        32000 a  varying
 d  sText2         d        32000 a  varying
 c                eval  sText1 = sText2

only the length of sText2 is copied to sText1.  not the 32000 size of
sText2.

Based on what Hans said the other day, ILE doesnt know varying. So I guess
ILE copies the entire value, not knowing that the data is a varying string.

I dont know how to work with null term strings in RPG but am interested in
knowing if they would pass and return better in ILE than varying length
strings.

Steve Richter

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Follow-Ups:

RE: timings II. const varying vs value varying , Scott Klement

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