Updated README.md with benchmark information for NSJSONSerialization.

Author: johnezang

README.md

@@ -5,6 +5,8 @@ Copyright © 2011, John Engelhart.
 
 ### A Very High Performance Objective-C JSON Library
 
+**UPDATE:** (2011/12/18) The benchmarks below were performed before Apples [`NSJSONSerialization`][NSJSONSerialization] was available (as of Mac OS X 10.7 and iOS 5).  The obvious question is: Which is faster, [`NSJSONSerialization`][NSJSONSerialization] or JSONKit?  According to [this site](http://www.bonto.ch/blog/2011/12/08/json-libraries-for-ios-comparison-updated/), JSONKit is faster than [`NSJSONSerialization`][NSJSONSerialization].  Some quick "back of the envelope" calculations using the numbers reported, JSONKit appears to be approximately 25% to 40% faster than [`NSJSONSerialization`][NSJSONSerialization], which is pretty significant.
+
   Parsing  |  Serializing
 :---------:|:-------------:
 <img src="http://chart.googleapis.com/chart?chf=a,s,000000%7Cb0,lg,0,6589C760,0,6589C7B4,1%7Cbg,lg,90,EFEFEF,0,F8F8F8,1&chxl=0:%7CTouchJSON%7CXML+.plist%7Cjson-framework%7CYAJL-ObjC%7Cgzip+JSONKit%7CBinary+.plist%7CJSONKit%7C2:%7CTime+to+Deserialize+in+%C2%B5sec&chxp=2,40&chxr=0,0,5%7C1,0,3250&chxs=0,676767,11.5,1,lt,676767&chxt=y,x,x&chbh=a,5,4&chs=350x185&cht=bhs&chco=6589C783&chds=0,3250&chd=t:410.517,510.262,539.614,1351.257,1683.346,1747.953,2955.881&chg=-1,0,1,3&chm=N+*s*+%C2%B5s,676767,0,0:5,10.5%7CN+*s*+%C2%B5s,3d3d3d,0,6,10.5,,r:-5:1&chem=y;s=text_outline;d=666,10.5,l,fff,_,Decompress+%2b+Parse+is+just;ds=0;dp=2;py=0;of=58,7%7Cy;s=text_outline;d=666,10.5,l,fff,_,5.6%25+slower+than+Binary+.plist%21;ds=0;dp=2;py=0;of=53,-5" width="350" height="185" alt="Deserialize from JSON" /> | <img src="http://chart.googleapis.com/chart?chf=a,s,000000%7Cb0,lg,0,699E7260,0,699E72B4,1%7Cbg,lg,90,EFEFEF,0,F8F8F8,1&chxl=0:%7CTouchJSON%7CYAJL-ObjC%7CXML+.plist%7Cjson-framework%7CBinary+.plist%7Cgzip+JSONKit%7CJSONKit%7C2:%7CTime+to+Serialize+in+%C2%B5sec&chxp=2,40&chxr=0,0,5%7C1,0,3250&chxs=0,676767,11.5,1,lt,676767&chxt=y,x,x&chbh=a,5,4&chs=350x175&cht=bhs&chco=699E7284&chds=0,3250&chd=t:96.387,466.947,626.153,1028.432,1945.511,2156.978,3051.976&chg=-1,0,1,3&chm=N+*s*+%C2%B5s,676767,0,0:5,10.5%7CN+*s*+%C2%B5s,4d4d4d,0,6,10.5,,r:-5:1&chem=y;s=text_outline;d=666,10.5,l,fff,_,Serialize+%2b+Compress+is+34%25;ds=0;dp=1;py=0;of=51,7%7Cy;s=text_outline;d=666,10.5,l,fff,_,faster+than+Binary+.plist%21;ds=0;dp=1;py=0;of=62,-5" width="350" height="185" alt="Serialize to JSON" />
@@ -305,3 +307,4 @@ Example       | Result            | Argument
 [strtoull]: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/strtoull.3.html
 [getrusage]: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man2/getrusage.2.html
 [printf]: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/printf.3.html
+[NSJSONSerialization]: http://developer.apple.com/library/ios/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html