Hi Mark,
There is another fast method to consider
A=""
FOR I=1 TO 50000
IF A = "" THEN
A := I
END ELSE
A := @VM : I
END
NEXT I
It will take less then 1 second to finish on our system.
Dzevad
----- Original Message -----
From: "Mark Johnson" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, August 21, 2005 12:27 PM
Subject: [U2] REMOVE results as promised.
As promised, here are the results of 9 different methods of appending.
Basically program went like this:
A=""
FOR I=1 TO 50000
A<1,-1>=I
NEXT I
Style 1: <1,-1>
straight.......................................................1 minute,
29
seconds
Style 2: <-1> attribute level then CONVERT to
253...............................41 seconds
Style 3: DIM(50,000), MATWRITE, READ &
CONVERT.............................2
seconds
Style 4: DIM(50,000), then assign to variable and CONVERT to
253............1
second
Style 5: Target = null, []
replacing........................................................40
seconds
Style 6: Target=Space(1000000), [] replacing then TRIM........8 minutes,
55
seconds.
Style 7: Append, VM assigned inside
loop..............................................41 seconds
Style 8: Append, VM assigned outside loop then remove
last..................34
seconds.
Style 9: <1,MV> with MV+=MV as pointer.............................1
minute,
28 seconds
60 user D3 system on W2000 during normal business day.
It appears that Styles 3 & 4 escaped the suggestions and rose to the top.
Apparently the CONVERT (or RAISE/LOWER) functions are pretty quick. The
DIM is
incredibly quick.
I learned a lot and hope others can as well.
Thanks for everyone's suggestions.
Mark Johnson
If anyone wants further coding for any of the styles then don't hestitate
to
ask.
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