| ⇢ | A | SlaveOkay added | |
| B | ↘ | C | MongoCollection got worse |
| ⇢ | A | ReadPreference::setReadPreferenceFromSlaveOkay() added | |
| ⇢ | A | ReadPreference::getSlaveOkayFromReadPreference() added | |
| ⇢ | A | SlaveOkay::getSlaveOkay() added | |
| ⇢ | A | SlaveOkay::setSlaveOkay() added | |
| ⇢ | A | MongoCollection::parallelCollectionScan() added | |
| A | ↘ | B | MongoCollection::findAndModify() got worse |
| A | ↘ | C | MongoCollection::group() got worse |
| A | ↛ | MongoCollection::getSlaveOkay() removed | |
| A | ↛ | MongoCollection::setSlaveOkay() removed | |
| A | ↛ | MongoDB::getSlaveOkay() removed | |
| A | ↛ | MongoDB::setSlaveOkay() removed |