WthmO,
Text conversions of lists are notoriously slow!
To prove this, I just tested our two approaches wrapped in a repeat
loop (100x), so I could get significant measurements.
I used two built-in proplists, the XtraList & the movieXtraList
(after fattening up the movieXtraList by adding 'all the Xtras < the
letter n' to it).
Your text conversion approach is about 2 orders of magnitude slower ...
Here's the data & the handlers:
concatListsBK the XtraList, the movieXtraList
-- "72 miliseconds = (100x)"
-- "counts = " 77 31 108
ConcatListsHowdy the XtraList, the movieXtraList
-- "5475 miliseconds = (100x)"
-- "counts = " 77 31 108
on concatListsBK listA, listB
t = the milliseconds
repeat with j = 1 to 100
cA = listA.count
cB = listB.count
if cA < cB then
listC = listB.duplicate()
repeat with i = cA down to 1
listC.addAt(1, listA[i])
end repeat
else
listC = listA.duplicate()
repeat with i = cB down to 1
listC.addAt(1, listB[i])
end repeat
end if
end repeat
put (the milliseconds - t) && "miliseconds" & " = (100x)"
put "counts = ", listA.count, listB.count, listC.count
end
on ConcatListsHowdy list1, list2
t = the milliseconds
repeat with j = 1 to 100
sList1 = string ( list1 )
delete the last char of sList1
sList2 = string (list2 )
delete char 1 of sList2
m = ( value ( sList1 & "," && sList2 ) )
end repeat
put (the milliseconds - t) && "miliseconds" & " = (100x)"
put "counts = ", list1.count, list2.count, m.count
END ConcatListsHowdy
sorry dude.
hth
-Buzz
At 10:44 AM -0500 4/11/02, you wrote:
>At 14:48 -0700 04/10/2002, Buzz Kettles wrote:
>
>>note: string converting of lists is really slow.
>
>Yes, but with a long list, I would expect it to still be faster than a repeat.
>
>--
>-- WthmO
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