[ARROW-17129] [C++][Compute] Improve memory efficiency in Grouper

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• External issue URL: https://github.com/apache/arrow/issues/32431
• Assignee: Unassigned
• Reporter: Wes McKinney
• Created: 19/Jul/22 13:25
• Updated: 11/Jan/23 11:48

Description

There are APIs in arrow::compute::Grouper (GetUniques, Consume) which may be able to be refactored to write into preallocated memory or otherwise have a mode that does less mandatory allocation. We can investigate at some point

Issue Links

• relates to: ARROW-16755 [C++] Improve array expression and kernel evaluation performance on small inputs