"what is a timeout queue"
is setTimeout ! It means "overtime" when translated.
as to why process.nextTick is better than setTimeout blocks, I'll probably say:
process.nextTick puts the callback function at the top of the event queue, so he is the first to be picked when the current synchronization code (execution stack, as people often call it) is executed, and when the callback function is picked from the event queue. Is it easy to understand at the top? Multiple asynchronous tasks are lost in the event queue, there is always a sequence, the top is the front.
setTimeout is slower and easier to understand. No matter how this thing sets the timeout to 0 , it is always behind process.nextTick in the event queue.
it's not very professional, but it's about enough. If you need a more accurate answer, you'd better google it or turn over the node source code
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A function passed to process.nextTick () is going to be executed on the current iteration of the event loop, after the current operation ends. This means it will always execute before setTimeout and setImmediate. A setTimeout () callback with a 0ms delay is very similar to setImmediate ()
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