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Posted to issues@arrow.apache.org by "Panchen Xue (JIRA)" <ji...@apache.org> on 2018/01/11 16:19:03 UTC

[jira] [Assigned] (ARROW-1712) [C++] Add method to BinaryBuilder to reserve space for value data

     [ https://issues.apache.org/jira/browse/ARROW-1712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Panchen Xue reassigned ARROW-1712:
----------------------------------

    Assignee: Panchen Xue

> [C++] Add method to BinaryBuilder to reserve space for value data
> -----------------------------------------------------------------
>
>                 Key: ARROW-1712
>                 URL: https://issues.apache.org/jira/browse/ARROW-1712
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: Wes McKinney
>            Assignee: Panchen Xue
>             Fix For: 0.9.0
>
>
> The {{Resize}} and {{Reserve}} methods only reserve space for the value offsets. When building binary/string arrays with a known size (or some reasonable estimate), it would be more efficient to reserve once at the beginning to prevent internal reallocations



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