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由于刚好看到网上的一篇帖子，所以做了这个测试。测试结果发现：
1、DataView.RowsFilter 比 DataTable.Select 性能低很多。查询了MSDN ，发现 DataView 重要的一个功能就是 “筛选”数据，为什么性能还不如 DataTable.Select() 呢？
2、当做 1000w 数据测试时，出现了 SystemOutOfMemory 的异常。主要在这句：
// 1000w 数据时，出现了 SystemOutOfMemory 的异常
row = mDataTable.NewRow();
问题是：难道使用 NewRow() 时，有上限限制？
3、1000w 数据测试时，出现一个现象 ：添加前300w 数据时，时间花费都差不多；300-400w 时，时间是前面的一倍；400-500w 时间更是长久；好像越到后来时间越长？为什么呢？
1000w 数据测试“循环添加数据”功能的结果：
Adding data ...
Readed 1000000 rows [ 7651.0016 ms]...
Readed 2000000 rows [ 8341.9952 ms]...
Readed 3000000 rows [ 7030.1088 ms]...
Readed 4000000 rows [ 24545.2944 ms]...
Readed 5000000 rows [ 70251.016 ms]...
Readed 6000000 rows [ 369591.4464 ms]...
Readed 7000000 rows [ 668561.344 ms]...
Readed 8000000 rows [ 1384751.1744 ms]...
// 再往下就出现了 2 中所描述的异常
人老实，测试这么做也是没有办法，自己测试时，发现了好多需要改进的地方，希望大家不要见笑，帮我看看上面的问题，谢谢！
测试代码：
测试结果：
ROWS COUNT :50w
Readed 50000 rows [ 230.3312 ms]...
Readed 100000 rows [ 240.3456 ms]...
Readed 150000 rows [ 390.5616 ms]...
Readed 200000 rows [ 220.3168 ms]...
Readed 250000 rows [ 250.36 ms]...
Readed 300000 rows [ 450.648 ms]...
Readed 350000 rows [ 220.3168 ms]...
Readed 400000 rows [ 240.3456 ms]...
Readed 450000 rows [ 340.4896 ms]...
Readed 500000 rows [ 220.3168 ms]...
cost [ 3034.3632 ms ] to add [ 50w ] rows.
----- AddData() END -----
cost [ 8321.9664 ms ] mDataTable.PrimaryKey...
cost [ 26658.3328 ms ] mDataTable.DefaultView...
PrimaryKey Columns Details;
Column Name: index
Column DataType: Double
Column Name: content
Column DataType: String
cost [ 34980.2992 ms ] to AddPrimaryKey().
----- AddPrimaryKey() END -----
running 1 times ...
mDataTable.Select("index < 80000"):
440.6336 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3304.752 ms
dv.RowFilter = "index < 80000":
27880.0896 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
28591.112 ms
running 2 times ...
mDataTable.Select("index < 80000"):
430.6192 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3254.68 ms
dv.RowFilter = "index < 80000":
28120.4352 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
28200.5504 ms
running 3 times ...
mDataTable.Select("index < 80000"):
410.5904 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3244.6656 ms
dv.RowFilter = "index < 80000":
28070.3632 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
28721.2992 ms
running 4 times ...
mDataTable.Select("index < 80000"):
430.6192 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3244.6656 ms
dv.RowFilter = "index < 80000":
27719.8592 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
27960.2048 ms
running 5 times ...
mDataTable.Select("index < 80000"):
410.5904 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3555.112 ms
dv.RowFilter = "index < 80000":
27970.2192 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
28170.5072 ms
running 6 times ...
mDataTable.Select("index < 80000"):
430.6192 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3284.7232 ms
dv.RowFilter = "index < 80000":
28671.2272 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
28150.4784 ms
running 7 times ...
mDataTable.Select("index < 80000"):
440.6336 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3254.68 ms
dv.RowFilter = "index < 80000":
27639.744 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
27970.2192 ms
running 8 times ...
mDataTable.Select("index < 80000"):
420.6048 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3214.6224 ms
dv.RowFilter = "index < 80000":
27389.384 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
27820.0032 ms
running 9 times ...
mDataTable.Select("index < 80000"):
430.6192 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3184.5792 ms
dv.RowFilter = "index < 80000":
27529.5856 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
27709.8448 ms
running 10 times ...
mDataTable.Select("index < 80000"):
430.6192 ms
mDataTable.Select("index < 80000 or (content LIKE '%200%')"):
3194.5936 ms
dv.RowFilter = "index < 80000":
27339.312 ms
dv.RowFilter = "index < 80000 or (content LIKE '%200%')":
28020.2912 ms
cost [ 596657.952 ms ] to WHILE loop.
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