Performance Comparison with Couchdbkit example is wrong

```
$ python -m unittest test.test_couchdbkit
Ran 4 tests in 1.403s
...
$ python -m unittest test.test_couchdbkit
Ran 4 tests in 0.153s
...
```

I guess the second run should be:
```
$ python -m unittest test.test_jsonobject
```