지금 생각중인건 TouchXML과 TBXML
쓰기는 TBXML이 더 쉬워보이는데, TouchXML을 더 많이 쓰는 거 같다.
공부해보자!
아래는 성능 비교표 
* = with TinyXPath
NSXML
libxml2 – SAX
TBXML
TouchXML
KissXML
TinyXML
GDataXML
libxml2 – DOM
Included with SDK?
Yes
Yes
No
No
No
No
No
Yes
Seconds to Parse
1.87
1.19
0.68
1.1
1.37
1.27
1.07
0.84
Peak Memory Usage
3.11
3.01
3.07
6.5
5.25
4.8
4.15
4.97
Parse While Downloading?
No
Yes
No
No
No
No
No
No
Edit/Save XML?
No
No
No
No
Yes
Yes
Yes
Yes
XPath Support?
No
No
No
Yes
Yes
Yes*
Yes
Yes
C or Obj-C
Obj-C
C
Obj-C
Obj-C
Obj-C
C
Obj-C
C
License
Apple
MIT
MIT
MIT
MIT
ZLib
Apache
MIT
출처: http://www.raywenderlich.com/553/how-to-chose-the-best-xml-parser-for-your-iphone-project
