Node.js FAQ: Top Questions

process.nextTick and setImmediate are Node.js mechanisms for scheduling callbacks, differing in when they execute relative to the event loop.

• nextTick: Queues a callback to run before the next event loop iteration, before I/O or timers.
• setImmediate: Schedules a callback for the check phase, after the poll phase.
• Priority: nextTick has higher priority, potentially starving I/O if overused.
• Use Case: nextTick for immediate tasks, setImmediate for deferring to after I/O.