David Li created ARROW-13197:
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Summary: [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
{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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