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New Built-In File Loop Variable: A_LoopFileNameNoExt
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SKAN



Joined: 26 Dec 2005
Posts: 5298
PostPosted: Mon Apr 21, 2008 8:25 pm    Post subject: Reply with quote
@corrupt:

Code:
Loop, %A_Windir%\*.* {
 File := A_LoopFileName, DllCall( "shlwapi.dll\PathRemoveExtensionA", Str,File )
 MsgBox, % File
}


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Oberon



Joined: 18 Feb 2008
Posts: 408
PostPosted: Mon Apr 21, 2008 8:56 pm    Post subject: Reply with quote
That's interesting Skan, I decided to benchmark and made some surprising observations...

Code:
SetBatchLines, -1
Process, Priority, , R

p = .\file.-1..txt
i = 250000

hModule := DllCall("LoadLibrary", "Str", "shlwapi.dll")
r = %p%
RegExMatch(r, ".+(?=.)", r)

t0 = %A_TickCount%
Loop, %i% {
   r = %p%
   DllCall("shlwapi.dll\PathRemoveExtensionA", "Str", r)
}

t1 = %A_TickCount%
Loop, %i% {
   r = %p%
   r := SubStr(r, 1, InStr(r, ".", "", 0) - 1)
}

t2 = %A_TickCount%
Loop, %i% {
   r = %p%
   RegExMatch(r, ".+(?=\.)", r)
}

t3 = %A_TickCount%
DllCall("FreeLibrary", "UInt", hModule)
MsgBox, % "DllCall:`t" . t1 - t0 . "`nSubStr:`t" . t2 - t1 . "`nRegEx:`t" . t3 - t2
   . "`n`nTime in ms over " . i . " tests."


On my core 2 duo 2ghz lappy I got the following results:

Quote:
DllCall: 952
SubStr: 406
RegEx: 358

Time in ms over 250000 tests.


This suggests that regex is almost three times faster than winapi functions. This is most probably due the overheads involved with dynamically importing functions, but pcre is extremely fast and this proves it.
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PostPosted: Mon Apr 21, 2008 8:59 pm    Post subject: Reply with quote
---------------------------
test.ahk
---------------------------
DllCall: 906
SubStr: 438
RegEx: 375

Time in ms over 250000 tests.
---------------------------
OK
---------------------------
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