[jira] [Updated] (ARROW-13197) [C++] Optimize ArrayBuilder::AppendScalar

["David Li (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-13197?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Li updated ARROW-13197:
-----------------------------
    Priority: Minor  (was: Major)

> [C++] Optimize ArrayBuilder::AppendScalar
> -----------------------------------------
>
>                 Key: ARROW-13197
>                 URL: https://issues.apache.org/jira/browse/ARROW-13197
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: C++
>            Reporter: David Li
>            Priority: Minor
>
> {quote}Hmm, it looks like the implementation could be more optimized. When appending multiple scalars (or multiple times the same scalars), the required space could be reserved. Also, at least for primitive types, I would expect appending multiple scalars to be much more streamlined than this.
> (it looks like such optimizations could be crafted more easily if {{AppendScalar}} was a bunch of virtual methods?)
> {quote}
> From https://github.com/apache/arrow/pull/10579#issuecomment-869731284
> Also, dictionary scalars aren't supported. You could imagine both appending a dictionary scalar to a regular builder (decoding the value) and appending a dictionary or regular scalar to a dictionary builder (encoding the value as necessary).



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