Properties faster than Fields ?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

JEB - 20 Jan 2005 19:37 GMT

I was trying to find out the fastest way (coding standards and best practices
aside) to set data into Business Entities which only job is to encasulate
DataTables from the Business Components processing them. We thought that
Fields would be faster but in a simple test of get/setting data into
properties, it seems they are faster up to a certain point.

Why is that? Does anyone know? Does .NET optimize the code in a particular
way that makes Fields manipulation the same as Properties?

Any help in understanding this is appreciated.

James

Reply to this Message

Sean Hederman - 20 Jan 2005 20:18 GMT

>I was trying to find out the fastest way (coding standards and best
>practices
[quoted text clipped - 6 lines]
> particular
> way that makes Fields manipulation the same as Properties?

If your properties are simple accessor properties, then the JIT will
optimize the calls away to direct field access.

Reply to this Message

JEB - 20 Jan 2005 20:37 GMT

Than why would it get slower after a certain number of iterations. Do you
know where I can find documentation on what the JIT optimizer will do for
Fields vs. Properties?

Thanks for your response, Sean.

James

> >I was trying to find out the fastest way (coding standards and best
> >practices
[quoted text clipped - 9 lines]
> If your properties are simple accessor properties, then the JIT will
> optimize the calls away to direct field access.

Reply to this Message

Sean Hederman - 20 Jan 2005 21:23 GMT

> Than why would it get slower after a certain number of iterations. Do you
> know where I can find documentation on what the JIT optimizer will do for
> Fields vs. Properties?

I have no idea why it would slow down, I'm afraid.

Have a look at:
http://discuss.develop.com/archives/wa.exe?A2=ind0205A&L=DOTNET&P=R1154
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/d
otnetperftechs.asp

Reply to this Message

JEB - 20 Jan 2005 22:41 GMT

Thanks, Sean. This answers my question and gives me some direction to
explain why there is a performance difference.

JEB

> > Than why would it get slower after a certain number of iterations. Do you
> > know where I can find documentation on what the JIT optimizer will do for
[quoted text clipped - 5 lines]
> http://discuss.develop.com/archives/wa.exe?A2=ind0205A&L=DOTNET&P=R1154
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dndotnet/html/d
otnetperftechs.asp

Reply to this Message

Properties faster than Fields ?

Free Magazines