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Posted to issues@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/11/15 13:02:00 UTC

[jira] [Updated] (ARROW-7177) [Java] Provide a utility to improve the performance of vector loading/unloading

     [ https://issues.apache.org/jira/browse/ARROW-7177?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-7177:
----------------------------------
    Labels: pull-request-available  (was: )

> [Java] Provide a utility to improve the performance of vector loading/unloading
> -------------------------------------------------------------------------------
>
>                 Key: ARROW-7177
>                 URL: https://issues.apache.org/jira/browse/ARROW-7177
>             Project: Apache Arrow
>          Issue Type: New Feature
>          Components: Java
>            Reporter: Liya Fan
>            Assignee: Liya Fan
>            Priority: Major
>              Labels: pull-request-available
>
> Vector loading/unloading transforms a set of vectors to and from a set of buffers with meta data. It is heavily used in flight/IPC. 
> In the loading/unloading operations, only the number of type buffers are really needed. However, the current code logic gets a copy of the type buffers, which is not necessary.
> In this issue, we provide a utility to get the number of type buffers, given an arrow type. It improves the performance by 
> 1. avoiding creating objects unnecessarily.
> 2. avoiding list copying for vector unloading (which calls TypeLayout#getBufferTypes).



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