Commits

Antoine Pitrou authored 31050a4e768
ARROW-10038: [C++] Spawn thread pool threads lazily Thread pool threads are not spawned until necessary to execute a pending task. Closes #8240 from pitrou/ARROW-10038-thread-pool-lazy Authored-by: Antoine Pitrou <antoine@python.org> Signed-off-by: Antoine Pitrou <antoine@python.org>