julia

ca286194 - Add JULIA_THREAD_SLEEP_THRESHOLD environment variable (#42981)

Add JULIA_THREAD_SLEEP_THRESHOLD environment variable (#42981) This patch re-introduces the code originally added in 4752908e61f45f85b684b2c8ed0085f0cf37f416 and was removed in 93e3d284a6205d9a9cca6d5bdb3856439e0b55ad.