yunmaoQu opened a new pull request, #23808:
URL: https://github.com/apache/pulsar/pull/23808
### Motivation
Schema creation (e.g., `Schema.AVRO(SomeClass.class)`) is fairly CPU
intensive. It would be useful it there would be a weak reference cache for
caching the schema instance.
### Modifications
- Add SchemaCache implementation using WeakHashMap for schema instance
caching
- Add cache configuration and metrics for monitoring
- Add cleanup strategy for expired cache entries
- Modify Schema creation methods (AVRO/JSON/PROTOBUF) to use cache
- Add cloning mechanism to maintain schema immutability
### Documentation
- [x] doc-not-needed
No documentation changes required as this is an internal performance
optimization
### Matching PR in forked repository
N/A
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