| C | ↘ | F | MongoCollection got worse |
| ⇢ | D | MongoCollection::convertWriteConcernOptions() added | |
| ⇢ | A | WriteConcern::createWriteConcernFromParameters() added | |
| ⇢ | A | MongoDB::getCollectionInfo() added | |
| ⇢ | A | Mongo::switchSlave() added | |
| ⇢ | A | MongoCode::toBSONType() added | |
| A | ↘ | B | MongoCollection::update() got worse |
| A | ↘ | C | TypeConverter::convertToLegacyType() got worse |
| A | ↛ | MongoClient::switchSlave() removed |