[ARROW-2211] [C++] Use simpler hash functions for integers

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/18175
• Assignee: Antoine Pitrou
• Reporter: Wes McKinney
• Created: 25/Feb/18 18:32
• Updated: 11/Jan/23 07:19
• Resolved: 22/Nov/18 19:56

Description

We are using a relatively complex hash function on 32- and 64-bit integers. A simpler hash with fewer CPU instructions should be sufficient for our needs

Issue Links

• is superceded by: ARROW-2653 [C++] Refactor hash table support