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https://issues.apache.org/jira/browse/BEAM-14166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17550064#comment-17550064
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Danny McCormick commented on BEAM-14166:
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This issue has been migrated to https://github.com/apache/beam/issues/21634
> Improvements to RowWithGetter
> -----------------------------
>
> Key: BEAM-14166
> URL: https://issues.apache.org/jira/browse/BEAM-14166
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-core
> Reporter: Moritz Mack
> Assignee: Moritz Mack
> Priority: P2
> Time Spent: 4h 20m
> Remaining Estimate: 0h
>
> Various improvements to getValue(fieldIdx) in RowWithGetters mentioned
> [here|[https://github.com/apache/beam/pull/16947#discussion_r833602836]:]
> * Minimize memory overhead of cache using either a index lookup (array) or a
> single hash map if number of fields exceeds the initial hashmap capacity
> * The cache should be checked before calling a getter to avoid any
> potentially unnecessary conversion in the getter itself.
> * [Nested
> rows|https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/values/RowWithGetters.java#L111]
> should be cached, otherwise the cache of such nested rows can't be leveraged.
> * Handling of collections / maps / iterables can be significantly improved
> by simply skipping the transform in all cases where {{getValue}} for members
> is the [identity
> transform|https://github.com/apache/beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/values/RowWithGetters.java#L142].
>
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