the-other-tim-brown opened a new pull request, #13614:
URL: https://github.com/apache/hudi/pull/13614
### Change Logs
**Avro Record Buffer Serializer Improvements**
- Fix handling of delete records and add unit testing for this case
- Create thread-local cache of Kryo
Benchmarking of before/after the thread-local changes shows large win:
```
* baseline avgt 25 94770.228 ± 2012.900 ns/op
* new avgt 25 4.641 ± 0.040 ns/op
```
**Merger Changes**
- Move any validation to happen in the constructor of instances to avoid
calls per record merge
- Create a class to return instead of Pair to avoid auto boxing of boolean
to Boolean and then unboxing to boolean which incurs 17% longer runtime than
just defining a simple object with primitive boolean
**File Group Reader Changes**
- Inline methods with 1-2 lines and reuse common code
- Use `ifPresent` instead of `isPresent` and `get` for more functional style
and avoid extra calls
### Impact
- Improves performance of critical paths of the FileGroupReader, especially
around the Metadata Table reads
### Risk level (write none, low medium or high below)
Low
### Documentation Update
_Describe any necessary documentation update if there is any new feature,
config, or user-facing change. If not, put "none"._
- _The config description must be updated if new configs are added or the
default value of the configs are changed_
- _Any new feature or user-facing change requires updating the Hudi website.
Please create a Jira ticket, attach the
ticket number here and follow the
[instruction](https://hudi.apache.org/contribute/developer-setup#website) to
make
changes to the website._
### Contributor's checklist
- [ ] Read through [contributor's
guide](https://hudi.apache.org/contribute/how-to-contribute)
- [ ] Change Logs and Impact were stated clearly
- [ ] Adequate tests were added if applicable
- [ ] CI passed
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