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Testing Inline ASM-VB
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Right$ vs Mid$Right$ seems to be faster, although the last returned value might be reason to argue.
But that's why I always test everything 5 times =o).
I used Mid$ to return the last 10 characters of a line, and Right$ to do the same.
User contributed notes:
But that's why I always test everything 5 times =o).
I used Mid$ to return the last 10 characters of a line, and Right$ to do the same.
Startup: Code: |
| Mid$ % faster than Right$ | Mid$ (sec) | Right$ (sec) |
| 25.7% | 0.337768 | 0.268625 |
| 24.6% | 0.340531 | 0.273254 |
| 23.5% | 0.336644 | 0.272481 |
| 26.1% | 0.339100 | 0.268942 |
| 6.7% | 0.336155 | 0.315059 |
User contributed notes:
| Author: PRoPHEZZoR (Name_Here_No_Spam at HaCKERMAiL dot COM) | Date: 11:08 24/08/2004 |
| Your Mid$() thingy gets 2 values, try Mid$(strString,10) instead. | |
| Author: Javin () | Date: 20:08 25/08/2004 |
|
It only makes sense to me that passing Mid$ two values would be the appropriate way to do it. By giving it the 10 character flag, it'll know what the "end" of the string will be in advance, without having to figure it out as it goes along. -Javin |
|
| Author: Tom (hure) | Date: 14:05 31/05/2005 |
| Yes, but an extra argument adds extra overhead in the form of stack allocation. This test isn't really fair; use the right function for the right job and leave it at that. | |
| Author: Almar () | Date: 20:05 31/05/2005 |
| It's just a test, ofcourse it would be logical that right would be faster. :) | |
| Author: Tom (hurendo_kun at hotmail dot com) | Date: 15:06 08/06/2005 |
| Right. :) | |
| Author: SuperDre () | Date: 16:06 22/06/2006 |
|
Well, this shows that Right$ is faster then Mid$, why? in this example you know how long the string is beforehand so you know the last 10 characters start at position 10. But in normal coding you have to do an extra check (which I guess Right$ does also do itself internally), so in normal coding if you use mid$() it would look something like this: Public Sub TestOne() Dim strRet As String Dim lLength As Long lLength = Len(StrString) if l > 10 then strRet = Mid$(strString, l, 10) else strRet = strString end if End Sub |
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| Author: Almar () | Date: 19:06 22/06/2006 |
| You'd be suprised how many people use Mid$() for the same thing as what they could have done with Right$() :). | |