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https://issues.apache.org/jira/browse/HADOOP-18748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17724947#comment-17724947
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ASF GitHub Bot commented on HADOOP-18748:
-----------------------------------------
alkis opened a new pull request, #5685:
URL: https://github.com/apache/hadoop/pull/5685
### Description of PR
Optimize `Configuration.handleDeprecation` by adding a fastpath for when a
property is not deprecated. While at it factor out property propagation so that
it can be reused by both main and overlay properties.
### How was this patch tested?
Existing tests.
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [ ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
> Configuration.get is slow
> -------------------------
>
> Key: HADOOP-18748
> URL: https://issues.apache.org/jira/browse/HADOOP-18748
> Project: Hadoop Common
> Issue Type: Improvement
> Components: conf
> Reporter: Alkis Evlogimenos
> Priority: Major
>
> `Configuration.get` is slow mainly because of the overhead of
> `handleDeprecation`.
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