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https://issues.apache.org/jira/browse/ARROW-11696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17297721#comment-17297721
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Andrew Lamb commented on ARROW-11696:
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[~domoritz] I wonder if you mean this reader:
https://docs.rs/arrow/3.0.0/arrow/ipc/reader/struct.FileReader.html#method.try_new
If so, while it is called a `FileReader` I think that is somewhat misleading.
It requires something that implements `std::io::Read` -- which `&[u8]` does.
https://doc.rust-lang.org/std/io/trait.Read.html#impl-Read-2
> [Rust] Create record batches from in memory IPC without memory copies
> ---------------------------------------------------------------------
>
> Key: ARROW-11696
> URL: https://issues.apache.org/jira/browse/ARROW-11696
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust
> Reporter: Dominik Moritz
> Priority: Major
>
> I have the IPC format of Arrow record batches in memory (e.g. as {{&[u8]}})
> and would like to create a vector of batches while avoiding as many memory
> copies as possible. It would be great if there was a way to create the vector
> without having to go through the file abstraction.
> I might be misunderstanding the way the file reader works and maybe it does
> not incur memory copies. I think it does, though, since creating arrow record
> batches from a larger arrow buffer takes much longer.
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