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Chris Brandsma — Wed, 01 Jul 2009 19:39:27 +0000

1. were you testing in debug mode? That changes a lot of metrics.
2. a delegate is nothing more than a function pointer. I use them constantly in a multitude of situations and have never seen a significant performance hit using delegates. Note: Action and Func are still only delegates.
3. Define large and I’ll tell you if I care.
4. In my case, the database calls make up the VAST majority of the performance problems.

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Itay Sagui — Wed, 01 Jul 2009 18:16:55 +0000

What about performance? from my VERY non-complete testing, the new solution takes almost 3 times longer to execute.
Obviously, if you are creating small XMLs this is not an issue, but if you have to handle a large data set, aren’t you worried that using the Action delegate hurts performance too much?

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Chris Brandsma — Mon, 22 Jun 2009 14:32:51 +0000

@John, I’ve seen Rhino Mocks use the ‘using’ statement to give a type of closure for doing things like that. The nice part about using a ‘using’ statement is the code is then .net 2.0 compatible.

But, I can’t just implement IDisposable on XmlWriter. More than likely it already implements it anyway, which means I don’t think I can overwrite it. That means I would still have to create a new method for XmlWriter that returned a custom object (which implements IDisposable) so I could use ‘using’ on that object — and then I would have to re-implement a whole bunch of XmlWriter methods.

Basically, unless you own the entire code base, and IDisposable is not already in use, … no that is just a lot of work.

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John — Mon, 22 Jun 2009 12:31:52 +0000

How about implementing IDisposable and writing the end element in the dispose?

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Reflective Perspective - Chris Alcock » The Morning Brew #373 — Mon, 22 Jun 2009 07:34:46 +0000

[...] Refactoring XmlWriter – Chris Brandsma talks about some recent work he did with refactoring the use of XMLWriter in some code, using Lambda expressions to help make the code safer and easier [...]

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Chris Brandsma — Mon, 22 Jun 2009 03:20:26 +0000

@John, Inherited code. You make it work for you.

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John Sheehan — Mon, 22 Jun 2009 02:56:11 +0000

You’re sort of recreating the syntax used by LINQ to XML, was that not available for your project?

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Arjan’s World » LINKBLOG for June 21, 2009 — Sun, 21 Jun 2009 19:32:12 +0000

[...] Refactoring XmlWriter – Chris Brandsma [...]

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Daily Links for Sunday, June 21th, 2009 — Sun, 21 Jun 2009 11:36:59 +0000

[...] Refactoring XmlWriter | Elegant Code [...]

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Chris Brandsma — Sat, 20 Jun 2009 22:03:40 +0000

Hey Sergio,

Now that you bring it up I remember you posting that. I had to laugh/cringe at some of the comments you go for that tho.
I’m still waiting to see if the anti-lambda police will come after me for this one as well.