Commits
Weston Pace authored and David Li committed 24e3b7f786b
ARROW-12097: [C++] Modify BackgroundGenerator so it creates fewer threads Closes #9808 from westonpace/feature/arrow-12097 Authored-by: Weston Pace <weston.pace@gmail.com> Signed-off-by: David Li <li.davidm96@gmail.com>