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https://issues.apache.org/jira/browse/ARROW-4502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rok Mihevc updated ARROW-4502:
------------------------------
External issue URL: https://github.com/apache/arrow/issues/21054
> [C#] Add support for zero-copy reads
> ------------------------------------
>
> Key: ARROW-4502
> URL: https://issues.apache.org/jira/browse/ARROW-4502
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C#
> Reporter: Eric Erhardt
> Assignee: Eric Erhardt
> Priority: Major
> Labels: performance, pull-request-available
> Fix For: 0.13.0
>
> Original Estimate: 48h
> Time Spent: 8h 20m
> Remaining Estimate: 0h
>
> In the Python (and C++) API, you can create a `RecordBatchStreamReader`, and
> if you give it an `InputStream` that supports zero-copy reads, you can get
> back `RecordBatch` objects without allocating new memory and copying all the
> data.
> There is currently no way to read Arrow RecordBatch instances without
> allocating new memory and copying all the data. We should enable this
> scenario in the C# API.
>
> My proposal is to create a new `class ArrowRecordBatchReader : IArrowReader`.
> It's constructor will take a `ReadOnlyMemory<byte> data` parameter, and it
> will be able to read `RecordBatch` instances just like the existing
> `ArrowStreamReader`. As part of this new class, we will refactor any common
> code out of `ArrowStreamReader` in order for the parsing logic to be shared,
> where necessary.
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