lhotari opened a new pull request, #24682:
URL: https://github.com/apache/pulsar/pull/24682

   Fixes #24644
   
   ### Motivation
   
   See #24644. Currently in Pulsar, MessageMetadata isn't cached in the broker 
entry cache and parsing of MessageMetata also happens multiple times during 
dispatching.
   
   ### Modifications
   
   - add MessageMetadata caching
   - cleanup and optimize BrokerEntryMetadata parsing
   
   ### 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 
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   - [x] `doc-not-needed` <!-- Your PR changes do not impact docs -->
   - [ ] `doc-complete` <!-- Docs have been already added -->


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