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Posted to issues@arrow.apache.org by "Wes McKinney (Jira)" <ji...@apache.org> on 2020/05/19 20:33:00 UTC

[jira] [Updated] (ARROW-8862) [C++] NumericBuilder does not use MemoryPool passed to CTOR

     [ https://issues.apache.org/jira/browse/ARROW-8862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated ARROW-8862:
--------------------------------
    Summary: [C++] NumericBuilder does not use MemoryPool passed to CTOR  (was: NumericBuilder does not use MemoryPool passed to CTOR)

> [C++] NumericBuilder does not use MemoryPool passed to CTOR
> -----------------------------------------------------------
>
>                 Key: ARROW-8862
>                 URL: https://issues.apache.org/jira/browse/ARROW-8862
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>    Affects Versions: 0.15.0
>            Reporter: Simon Watts
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> {{NumericBuilder}} uses the {{pool}} ({{MemoryPool*}}) parameter to initialise the {{ArrayBuilder}} base class, but does not use it to initialise its own internal builder, {{data_builder_}} ({{TypedBufferBuilder}}). For comparison {{ArrayBuilder}} uses the {{pool}} to initialise its own {{null_bitmap_builder_}} member (also a {{TypedBufferBuilder}}).
> Found in version 0.15.0, present in current head.
> This effect was observed when trying to switch to a custom {{MemoryPool}} for performance reasons. A hook was used to detect any use of the {{MemoryPool}} proved by {{default_memory_pool()}}.



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