[jira] [Updated] (ARROW-11696) [Rust] Create record batches from in memory IPC without memory copies

["Dominik Moritz (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-11696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dominik Moritz updated ARROW-11696:
-----------------------------------
    Summary: [Rust] Create record batches from in memory IPC without memory copies  (was: [Rust] Create record batches from in memory IPC)

> [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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