Following work in ARROW-16824

Reporter: Wes McKinney / @wesm
Assignee: Wes McKinney / @wesm

Related issues:

• [C++] Improve array expression and kernel evaluation performance on small inputs (is a child of)

PRs and other links:

• GitHub Pull Request #13630

_{Note: This issue was originally created as ARROW-16852. Please see the migration documentation for further details.}