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Posted to issues@arrow.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2016/05/02 18:40:13 UTC

[jira] [Commented] (ARROW-110) [C++] Decide on optimal growth factor when appending to buffers/arrays

    [ https://issues.apache.org/jira/browse/ARROW-110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15266944#comment-15266944 ] 

Jacques Nadeau commented on ARROW-110:
--------------------------------------

We chose 2x in Java since we're using a buddy allocator, fyi.

> [C++] Decide on optimal growth factor when appending to buffers/arrays
> ----------------------------------------------------------------------
>
>                 Key: ARROW-110
>                 URL: https://issues.apache.org/jira/browse/ARROW-110
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++
>            Reporter: Micah Kornfield
>
> There is some evidence that powers of 2 might not be optimal (the facebook folly library suggests this in there explanation of why they have there own vector type).  They use 1.5 (as do other implementations that don't use two).



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