Github user kl0u commented on the issue: https://github.com/apache/flink/pull/3961 Hi @dawidwys ! Your understanding is correct in the sense that it does not leverage to the fullest the fact of keys being returned in order. The reason is that this is valid only in RocksDB state backend. But when it comes to insertion to the PriorityQueue, this can come in handy as inserting will be fast. In addition, as you said, we only deserialize the values we need, when we need them, instead of everything all the time.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---