On Monday, July 14, 2003, at 09:19 AM, Trevor DeVore wrote:
What I do is set i to 1 before the loop starts and then at the end of my repeat loop statements I put "add 1 to i". That way you keep track of what iteration you are on but you get the speed of the repeat for each. At least that is my theory. I haven't done time comparisons.
You are right; "add 1 to i" is constant time for each loop cycle, and so will cost you time proportionally to the number of lines. The "repeat with i" _with_ line chunking will cost you proportionally to the square of the size of the data. The "repeat for each" will cost you proportional to the size of the data. ("Size of data" is my fuzzy way of vaguely accounting for chars and lines.)
Not only that, that constant time for each loop cycle is very small for 'add 1 to i". It takes 0.7 microseconds on my computer. (BTW, 'put x + 1 into x' takes 1.4 microseconds, so, is fast too, so use whatever is readable.)
Dar Scott
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