| A | ↛ | Jetpack_Sync_Heartbeat removed |
| C | ↗ | B | Jetpack_Sync_Queue::checkout_with_memory_limit() improved |
| A | ↛ | Jetpack_Sync_Heartbeat::get_stat_data() removed | |
| A | ↛ | Jetpack_Sync_Heartbeat::get_additional_stat_data() removed | |
| A | ↛ | Jetpack_Sync_Heartbeat::init() removed |