[
https://issues.apache.org/jira/browse/ARROW-10274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17211853#comment-17211853
]
Jorge Leitão commented on ARROW-10274:
--------------------------------------
> Maybe we could directly write the arithmetic result to a mutable buffer and
> prevent this redundant copy?
Yes :)
> [Rust] arithmetic without SIMD does unnecesary copy
> ---------------------------------------------------
>
> Key: ARROW-10274
> URL: https://issues.apache.org/jira/browse/ARROW-10274
> Project: Apache Arrow
> Issue Type: Improvement
> Components: Rust
> Reporter: Ritchie
> Priority: Minor
>
> The arithmetic kernels that don't use SIMD create a `vec` in memory and later
> copy that data into a Buffer. Maybe we could directly write the arithmetic
> result to a mutable buffer and prevent this redundant copy?
>
>
> {code:java}
> let values = (0..left.len())
> .map(|i| op(left.value(i), right.value(i)))
> .collect::<Vec<T::Native>>();
>
>
> let data = ArrayData::new(
> T::get_data_type(),
> left.len(),
> None,
> null_bit_buffer,
> 0,
> vec![Buffer::from(values.to_byte_slice())],
> vec![],
> );{code}
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
