Real long For loop

I´am redoing a old program with a really long Test Case, and for later use of latebinding am creating a string of part numbers.

for i from 10000 to 999999999 step 1 do

Test i

Case 10000:

case 90000:

case 999769:

endtest

endfor

it will take forever, for i going for 1 to 10 taks 1sekunds in my VC, then the program will take 227 hours to run. Why? (even if i´m runing QuickTeach or RSO.)
temp_1.zip (3.68 KB)