What is faster? DirectCast(myObj, Integer) or Convert.ToInt32(myObj) ???

[Andreas Klemt]

Hello,
what has the better performance and what are you using?

Dim myObj As Object = 70
a) Dim myInt As Integer = DirectCast(myObj, Integer)
b) Dim myInt As Integer = Convert.ToInt32(myObj)

Thanks,
Andreas

 

[Andreas Klemt]

Hello John,
here are my measurements:

Convert.ToInt32 0,37
DirectCast(myObj, Integer) 0,04

Convert.ToString(myObj) 0,42
DirectCast(myObj, String) 0,07
CStr(myObj) 0,50
CType(myObj, String) 0,50

So DirectCast is much faster. What do you use?

Regards,
Andreas

 

[Karl Seguin]

Andreas, how many times do you plan on posting the same question? You've
asked it 4 times since yesterday, always slightly differently..and EACH AND
EVERY TIME someone has provided you with a quality answer.

Did you read "Conversion Functions, CType, DirectCast, and System.Convert"
at
http://msdn.microsoft.com/library/d...tml/vbtchmicrosoftvisualbasicnetinternals.asp
(as was previously provided)?? It provides a microsoft recommentation as to
which to use...what more could you possibly want?

Karl

 

[Andreas Klemt]

Hello Karl,
I was confused about DirectCast because I never heard about it.
Now after I tested it, everything is clear.

Thanks to you for the link!!

Best Regards,
Andreas

 

[John Saunders]

C#

In C#, I use (int) myObj, which is about the same thing as DirectCast.