| ⇢ | F | User_Agent_Info added | |
| ⇢ | F | Error_Handler added | |
| ⇢ | A | VersionSelectorTest added | |
| ⇢ | A | Plugins_Handler added | |
| ⇢ | A | Device_Detection added | |
| ⇢ | A | PluginsHandlerTest added | |
| ⇢ | A | Test_Device_Detection added | |
| ⇢ | A | Heartbeat added | |
| ⇢ | A | Autoloader_Handler added | |
| ⇢ | A | Classes_Handler added | |
| ⋮ | view more | ||
| B | ↘ | C | Jetpack_Twitter_Timeline_Widget got worse |
| F | ↗ | B | Jetpack_User_Agent_Info improved |