| 
                                 40% 
             | 
    ↗ | 
                                 64% 
             | 
    CDatabaseModel improved | 
| 
                                 2 
             | 
    ↘ | 
                                 1 
             | 
    CDatabaseModel::create() improved | 
| 
                                 2 
             | 
    ↘ | 
                                 1 
             | 
    CDatabaseModel::update() improved | 
| 
                                 6 
             | 
    ↘ | 
                                 2.0185 
             | 
    CDatabaseModel::save() improved |