| C | ↘ | D | HistorySQLite got worse |
| ⇢ | A | HistorySQLite._get_event_fields() added | |
| A | ↘ | B | HistorySQLite.new_historized_event() got worse |
| A | ↘ | B | HistorySQLite._format_event() got worse |
| B | ↗ | A | Subscription.subscribe_events() improved |
| A | ↛ | HistoryManager._get_source_event_data() removed |