[ARROW-8969] [C++] Reduce generated code in compute/kernels/scalar_compare.cc

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/25093
• Assignee: Wes McKinney
• Reporter: Wes McKinney
• Created: 27/May/20 20:45
• Updated: 11/Jan/23 08:03
• Resolved: 18/Jun/20 01:16

Description

We are instantiating multiple versions of templates in this module for cases that, byte-wise, do the exact same comparison. For example:

• For equals, not_equals, we can use the same 32-bit/64-bit comparison kernels for signed int / unsigned int / floating point types of the same byte width
• TimestampType can reuse int64 kernels, similarly for other date/time types
• BinaryType/StringType can share kernels

etc.

Issue Links

• is a child of: ARROW-8894 [C++] C++ array kernels framework and execution buildout (umbrella issue)
• is related to: ARROW-8970 [C++] Reduce shared library / binary code size (umbrella issue)
• links to: GitHub Pull Request #7461