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https://issues.apache.org/jira/browse/ARROW-15167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17462745#comment-17462745
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Dragoș Moldovan-Grünfeld commented on ARROW-15167:
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I think row 981 is the issue as \{{std::stod}} converts a string to double
ttps://github.com/apache/arrow/blob/04641a38ee5da0fa1d745fd29fd4a206719338cd/r/src/array_to_vector.cpp#L981
> [R] Improve efficiency of decimal casting
> -----------------------------------------
>
> Key: ARROW-15167
> URL: https://issues.apache.org/jira/browse/ARROW-15167
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Reporter: Jonathan Keane
> Priority: Major
> Fix For: 8.0.0
>
>
> https://github.com/apache/arrow/blob/04641a38ee5da0fa1d745fd29fd4a206719338cd/r/src/array_to_vector.cpp#L975-L990
> "this looks quite inefficient (it roundtrips through a string representation
> instead of creating a double directly)."
> from: https://github.com/apache/arrow/pull/11898#discussion_r769657404
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