[
https://issues.apache.org/jira/browse/ARROW-10207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17218277#comment-17218277
]
Antoine Pitrou commented on ARROW-10207:
----------------------------------------
Hmm, this report may be mistaken. A scalar kernel always computes the output
nulls by default, and there is no exception for list-returning scalar kernels.
> [C++] Unary kernels that results in a list have no preallocated offset buffer
> -----------------------------------------------------------------------------
>
> Key: ARROW-10207
> URL: https://issues.apache.org/jira/browse/ARROW-10207
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Maarten Breddels
> Priority: Minor
> Fix For: 3.0.0
>
>
> I noticed in
> [https://github.com/apache/arrow/pull/8271]
> That a string->list[string] kernel does not have the offsets preallocated in
> the output. I believe there is a preference for not doing allocations in
> kernels, so this can be optimized at a higher level. I think it can also be
> done in this case.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
