You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@arrow.apache.org by "Mahmut Bulut (Jira)" <ji...@apache.org> on 2020/04/29 17:56:00 UTC

[jira] [Created] (ARROW-8629) [Rust] Eliminate indirection of ZST allocations

Mahmut Bulut created ARROW-8629:
-----------------------------------

             Summary: [Rust] Eliminate indirection of ZST allocations
                 Key: ARROW-8629
                 URL: https://issues.apache.org/jira/browse/ARROW-8629
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Rust
    Affects Versions: 0.17.0
            Reporter: Mahmut Bulut
            Assignee: Mahmut Bulut


Currently, no matter what any array construction without data creates 0 sized layouts and passes itself to Rust's allocator API, thus OS then comes back to the program and does the job.

This issue is two-fold:
 * First, this creates indirection and UB in a sense.
 * Second, degrades the performance for the merging simd, merging arrays, constructing arrays etc. and intermediate arrays when doing ops. over them.

The solution would be:
 * Having UB solved without a performance downside.
 * Improve the performance



--
This message was sent by Atlassian Jira
(v8.3.4#803005)