LINQ to XML的性能

   http://www.nearinfinity.com/blogs/page/jferner?entry=performance_linq_to_sql_vs

可以看哈评论。我的看法基本还是使用XMLReader好，但XmlDom与Linq to Xml比，Linq to XML还是要好一些。
   http://blogs.msdn.com/ericwhite/archive/2009/07/20/a-tutorial-in-the-recursive-approach-to-pure-functional-transformations-of-xml.aspx

UTF8Encoding

	1	10	100	1,000	10,000	100,000
XmlDocument	0.1567800	0.1713450	0.3888620	1.9816480	22.8049260	459.8570340
XmlReader	0.1467460	0.1439580	0.2300500	0.8534400	7.5771640	76.8635690
LINQ to XML	0.1499530	0.1500640	0.2778720	1.4616730	15.7719020	208.9360300

ASCIIEncoding

	1	10	100	1,000	10,000	100,000
XmlDocument	0.1659350	0.1922080	0.3433140	1.9846330	22.5484690	482.8699720
XmlReader	0.1376840	0.1453730	0.2199810	0.8768260	7.9187380	77.7760560
LINQ to XML	0.1345900	0.1573340	0.2848420	1.4889930	15.1504500	214.9338990

UTF32Encoding

	1	10	100	1,000	10,000	100,000
XmlDocument	0.1672370	0.1799780	0.4156250	2.7188370	30.6423960	543.4604540
XmlReader	0.1386820	0.1503870	0.2867400	1.4981070	14.4428430	152.7660780
LINQ to XML	0.1317060	0.1866610	0.5385940	2.3631290	21.4566290	274.3280280