[jira] [Commented] (ARROW-4709) [C++] Optimize for ordered JSON fields

[Rok Mihevc (Jira)]

[ 
https://issues.apache.org/jira/browse/ARROW-4709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17661731#comment-17661731
 ] 

Rok Mihevc commented on ARROW-4709:
---

This issue has been migrated to [issue 
#21235|https://github.com/apache/arrow/issues/21235] on GitHub. Please see the 
[migration documentation|https://github.com/apache/arrow/issues/14542] for 
further details.

> [C++] Optimize for ordered JSON fields
> --
>
> Key: ARROW-4709
> URL: https://issues.apache.org/jira/browse/ARROW-4709
> Project: Apache Arrow
>  Issue Type: New Feature
>  Components: C++
>Reporter: Ben Kietzman
>Assignee: Ben Harkins
>Priority: Minor
>  Labels: good-second-issue, pull-request-available
> Fix For: 11.0.0
>
>  Time Spent: 4h 20m
>  Remaining Estimate: 0h
>
> Fields appear consistently ordered in most JSON data in the wild, but the 
> JSON parser currently looks fields up in a hash table. The ordering can 
> probably be exploited to yield better performance when looking up field 
> indices



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[jira] [Commented] (ARROW-4709) [C++] Optimize for ordered JSON fields

[Antoine Pitrou (Jira)]

[ 
https://issues.apache.org/jira/browse/ARROW-4709?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17599627#comment-17599627
 ] 

Antoine Pitrou commented on ARROW-4709:
---

cc [~benpharkins] if you'd like to tackle a performance issue at some point.

> [C++] Optimize for ordered JSON fields
> --
>
> Key: ARROW-4709
> URL: https://issues.apache.org/jira/browse/ARROW-4709
> Project: Apache Arrow
>  Issue Type: New Feature
>  Components: C++
>Reporter: Ben Kietzman
>Priority: Minor
>  Labels: good-second-issue
>
> Fields appear consistently ordered in most JSON data in the wild, but the 
> JSON parser currently looks fields up in a hash table. The ordering can 
> probably be exploited to yield better performance when looking up field 
> indices



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