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Posted to jira@arrow.apache.org by "Antoine Pitrou (Jira)" <ji...@apache.org> on 2020/10/07 09:38:00 UTC

[jira] [Updated] (ARROW-10207) C++] Unary kernels that results in a list have no preallocated offset buffer

     [ https://issues.apache.org/jira/browse/ARROW-10207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou updated ARROW-10207:
-----------------------------------
    Component/s: C++

> 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
>
> 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. 



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