Re: [flexcoders] any performance hit using "as"?

[Pan Troglodytes]

Thanks for the reply, Matt.  Is there any performance difference between all three?  I'm curious if doing any casting at all is a performance hit.On 8/7/06, 
Matt Chotin <[EMAIL PROTECTED]> wrote:




















I don't think there should be a
performance difference between the two.

 

Matt

 









From: 
flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] 
On Behalf Of Pan Troglodytes
Sent: Monday, August 07, 2006 9:21
AM
To: flexcoders
Subject: [flexcoders] any performance
hit using "as"?



 







I tend to
like to make my code autosense for me, so sometimes I do things like this:

MyObjectType(grid.selectedItem).somefield = 3;

I assume that adds no overhead, since it is a straight cast (though I could be
wrong), since I have seen runtime errors specifically telling me my cast was
wrong.  But sometimes with Array, I have to use "as" because it
gets a cast confused with a new array contructor.  So I'm wondering what
the difference in performance is, if any. 

Given then grid.selectedItem is MyObjectType, consider the following
statements:

grid.selectedItem.somefield = 3;
MyObjectType(grid.selectedItem).somefield = 3;
(grid.selectedItem as MyObjectType).somefield = 3;


Is there any runtime performance difference to them?  I only just now read
the help on "as" I noticed that if it is NOT the desired type, it
returns null.  That totally messes with my brain, coming from a Delphi background where as throws an exception if it is
not the right type.  But the thrust of my question involves them being the
desired type. 

-- 
Jason 












-- Jason

__._,_.___





--
Flexcoders Mailing List
FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt
Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com








   



    


  
  
    SPONSORED LINKS
  
          
                  
            
        Web site design development
      
                      
        Computer software development
      
                      
        Software design and development
      
              
                        
            
        Macromedia flex
      
                      
        Software development best practice
      
                    
           
  







  
  
  YAHOO! GROUPS LINKS



   Visit your group "flexcoders" on the web. 
   To unsubscribe from this group, send an email to: [EMAIL PROTECTED] 
   Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.



  






__,_._,___