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https://issues.apache.org/jira/browse/ARROW-6601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16935613#comment-16935613
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Ji Liu commented on ARROW-6601:
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When working with Jdbc adapter benchmark, I found the jmh result is very worse
(about 1680000 ns/op), and I finally found that when we initialize a
VectorSchemaRoot, when call JdbcToArrowUtils#allocateVectors which is time
consuming, and this is not necessary since we use setSafe API in consumers.
After remove this, the jmh result is about 2000ns/op (3 coulumns with
valueCount = 3000).
I think this one should merged into 0.15 release.
> [Java] Improve JDBC adapter performance & add benchmark
> -------------------------------------------------------
>
> Key: ARROW-6601
> URL: https://issues.apache.org/jira/browse/ARROW-6601
> Project: Apache Arrow
> Issue Type: Task
> Components: Java
> Reporter: Ji Liu
> Assignee: Ji Liu
> Priority: Critical
>
> Add a performance test as well to get a baseline number, to avoid performance
> regression when we change related code.
>
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