added article

test/node_modules/qs/benchmark.js

@@ -0,0 +1,17 @@
+
+var qs = require('./');
+
+var times = 100000
+  , start = new Date
+  , n = times;
+
+console.log('times: %d', times);
+
+while (n--) qs.parse('foo=bar');
+console.log('simple: %dms', new Date - start);
+
+var start = new Date
+  , n = times;
+
+while (n--) qs.parse('user[name][first]=tj&user[name][last]=holowaychuk');
+console.log('nested: %dms', new Date - start);