Repeats repeated

[Terry Vogelaar]

Hi all,

Last week I asked a question about filtering the double lines in a var with many lines. The list helped very well by pointing out that I shouldn't use "repeat with", but "repeat for each", which brought the processing time back from 60 hours to 4 seconds (!)

So I tried the same technique with another script that has a triple repeat loop. The var "t" contains about 150 short lines and the script is intended to put every possible combination of 3 lines of t into a field:

repeat with f1 = 1 to the number of lines of t - 2
put line f1 of t into g1
repeat with f2 = f1+1 to the number of lines of t - 1
put line f2 of t into g2
repeat with f3 = f2+1 to the number of lines of t
put line f3 of t into g3
put g1&","&g2&","&g3& return after fld "uitvoer"
end repeat
end repeat
end repeat

That took 101 seconds. So I tried to speed it up with what I learned about "repeat for each":

put line 1 to -3 of t into t1
put 0 into f1
repeat for each line g1 in t1
add 1 to f1
put line f1+1 to -2 of t into t2
put 0 into f2
repeat for each line g2 in t2
add 1 to f2
put line f2+1 to -1 of t into t3
repeat for each line g3 in t3
put g1&","&g2&","&g3& return after fld "uitvoer"
end repeat
end repeat
end repeat

364 seconds! And I thought it would be faster! It involved some extra vars, but since it is not much data processed, I don't think memory issues could explain this.

Any thoughts why this is much slower than the original script and how I can speed this up?

Terry


_______________________________________________
use-revolution mailing list
[EMAIL PROTECTED]
http://lists.runrev.com/mailman/listinfo/use-revolution