shibd opened a new pull request, #23072: URL: https://github.com/apache/pulsar/pull/23072
### Motivation If a subscription has many consumers and each consumer individually acknowledges messages from other consumers, this scenario is very CPU resource-intensive. Refer this: <img width="2403" alt="image" src="https://github.com/user-attachments/assets/13ae45da-daa2-4f44-a8c9-820dac6a7344";> In fact, these three methods achieve the same goal: `obtaining the message ID from the owning consumer object` This operation is very CPU resource-intensive **getAckOwnerConsumer**: https://github.com/apache/pulsar/blob/d7e8ea16e6682df9a9354cda25cf4f1f9cb54429/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/Consumer.java#L735-L748 **getBatchSize**: https://github.com/apache/pulsar/blob/d7e8ea16e6682df9a9354cda25cf4f1f9cb54429/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/Consumer.java#L657 **removePendingAcks**: https://github.com/apache/pulsar/blob/d7e8ea16e6682df9a9354cda25cf4f1f9cb54429/pulsar-broker/src/main/java/org/apache/pulsar/broker/service/Consumer.java#L1024-L1034 This PR will make sure to call one time : `getAckOwnerConsumer` ### Modifications This PR ensures that the `getAckOwnerConsumer` method is called only once during the processing of a message ack. In the future, we may need to optimize this method further. After this PR: <img width="2139" alt="image" src="https://github.com/user-attachments/assets/61512c53-bde9-4e69-a05b-02974714d76d";> Test Code: ### Verifying this change All tests passed to make sure not have any break change. ### Documentation <!-- DO NOT REMOVE THIS SECTION. CHECK THE PROPER BOX ONLY. --> - [ ] `doc` <!-- Your PR contains doc changes. --> - [ ] `doc-required` <!-- Your PR changes impact docs and you will update later --> - [x] `doc-not-needed` <!-- Your PR changes do not impact docs --> - [ ] `doc-complete` <!-- Docs have been already added --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@pulsar.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
