Re: XML performance issue

On 2012-09-15, at 1:00 PM, rpg400-l-request@xxxxxxxxxxxx wrote:

I would love to see some RPG examples of this.

Simplest one of all:

D myBigField s 20000a Inz
D myBigVaryField s 20000a Inz Varying

D data s 40a Inz('Only 12 used')

D comma c ','

D i s 5i 0 Inz

/Free

For i = 1 to 1000;
myBigField = %TrimR(myBigField) + %TrimR(data) + comma;
EndFor;

For i = 1 to 1000;
myBigVaryField += %TrimR(data) + comma;
EndFor;

*InLR = *On;

Try this and you'll see that the second (varying) version is orders of magnitude faster. I've seen differences in excess of 1,000 times. I've also seen versions worse than the first one in that they used %Trim in both cases and not %TRimR.

And before anyone points it out, yes I know I probably don't want a comma at the end of the data ;-)


Jon Paris

www.partner400.com
www.SystemiDeveloper.com