How does Julia's task scheduler work internally?

Julia uses a cooperative task scheduler that switches tasks at yield points instead of preemption.

Julia's concurrency model is built around lightweight green threads called Tasks. These tasks are scheduled cooperatively, meaning they voluntarily yield control during blocking operations (I/O, locks, or explicit yield). The scheduler distributes tasks across available threads using a work-stealing queue model. This avoids heavy OS thread overhead while maintaining efficient parallel execution.