Here's the same solution, but with 1000001 records. On my machine, over 3
runs I get, 4924 millisec, 4932 ms, 4914 ms.
I'm sure others will now improve on that.
There are a couple of extra lines to do the timing which you'd remove for
your solution.
on mouseUp
--create the dummy list
put 1000000 into tRepeat
put 10 & tab & 5 & cr after tStore
put 10 into tLast
repeat tRepeat times
put (10 * random(5) + tLast) into tLast
put tLast & tab & random(30) & cr after tStore
end repeat
--do the work here
set the itemDelimiter to tab
put the millisec into tStartTime
put "first" into tLastItem
repeat for each line tLine in tStore
put item 1 of tLine into tCheck
switch
case (tLastItem = "first")
--don't do anything
break
case (tCheck - tLastItem > 20)
put tLastItem + 10 & tab & 0 & cr after tStore2
put tCheck - 10 & tab & 0 & cr after tStore2
break
case (tCheck - tLastItem > 10)
put tCheck - 10 & tab & 0 & cr after tStore2
break
end switch
put tLine & cr after tStore2
put tCheck into tLastItem
end repeat
put the millisec into tEndTime
put (tEndTime - tStartTime) & "ms" into msg
end mouseUp
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