I hate it when I post too quickly.
0 ms was just too good to be true so I investigated further and found 2
errors in my code. The real figures are
10,000 Unicode
Repeat Until: 19 ms
Repeat for Each: 3 ms
100,000 Unicode
Repeat Until: 1823 ms
Repeat for Each: 30 ms
1,000,000 Unicode
Repeat Until: 236688 ms
Repeat for Each: 295 ms
Which still proves the point that 'repeat for each' scales much better than
other repeat forms.
Corrected script below:
on mouseUp
--breakpoint
--create a random list of 20 ASCII chars between ASCII32 - ASCII 125
set the useUnicode to false
put empty into tLIST
repeat 20 times
put numToChar(random(94) + 31) after tLIST
end repeat
ask "How many characters do you want to process" with 100000 titled
"Enter Digits Only - No Punctuation"
put it into tNumOfChars
answer "Do you wish to test against Unicode chars?" with "Yes" or "No"
titled "Test Unicode"
put it into tUniCode
if (tUniCode = "Yes") then
set the useUnicode to true
put 65535 into tUpperLimit
else
put 255 into tUpperLimit
end if
repeat tNumOfChars times
put numToChar(random(tUpperLimit)) after tORIGIN
end repeat
put the number of chars in tORIGIN into msg
--so the 2nd test is identical
put tORIGIN into tORIGIN2
--TEST 1 TIMING
put the millisec into tStartTime
repeat until tORIGIN is empty
if tLIST contains the first char of tORIGIN then
put the first char of tORIGIN after tOUTPUT
delete the first char of tORIGIN
else
delete the first char of tORIGIN
end if
--put $ORIGIN into fld "fORIGIN2"--not required
end repeat
put tOUTPUT into tTest1
put the millisec into tEndTime
put tEndTime - tStartTime into tTest1Time
--TEST 2 TIMING
put the millisec into tStartTime
repeat for each char tChar in tORIGIN2
if (tLIST contains tChar) then
put tChar after tOUTPUT2
end if
end repeat
put tOUTPUT2 into tTest2
--breakpoint
put the millisec into tEndTime
put tEndTime - tStartTime into tTest2Time
--breakpoint
if (tTest1 = tTest2) then
put "Repeat Until: " & tTest1Time & " ms" & cr & \
"Repeat for Each: " & tTest2Time & " ms" into msg
else
put "Failed - Outputs not equal" into msg
end if
beep
--breakpoint
end mouseUp
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