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https://issues.apache.org/jira/browse/ARROW-10015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Grove resolved ARROW-10015.
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Fix Version/s: 2.0.0
Resolution: Fixed
Issue resolved by pull request 8370
[https://github.com/apache/arrow/pull/8370]
> [Rust] Implement SIMD for aggregate kernel sum
> ----------------------------------------------
>
> Key: ARROW-10015
> URL: https://issues.apache.org/jira/browse/ARROW-10015
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust
> Reporter: Jorge Leitão
> Assignee: Jörn Horstmann
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.0.0
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> Currently, our aggregations are made in a simple loop. However, as described
> [here|https://rust-lang.github.io/packed_simd/perf-guide/vert-hor-ops.html],
> horizontal operations can also be SIMDed, reports of 2.7x speedups.
> The goal of this improvement is to support SIMD for the "sum", for primitive
> types.
> The code to modify is in
> [here|https://github.com/apache/arrow/blob/master/rust/arrow/src/compute/kernels/aggregate.rs].
> A good indication that this issue is completed is when the script
> {{cargo bench --bench aggregate_kernels && cargo bench --bench
> aggregate_kernels --features simd}}
> yields a speed-up.
>
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