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priorityQueue: Prevent same tick setImmediate #1727

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merged 1 commit into from Oct 17, 2020
Merged

priorityQueue: Prevent same tick setImmediate #1727

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9 changes: 8 additions & 1 deletion lib/priorityQueue.js
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Expand Up @@ -28,6 +28,7 @@ import Heap from './internal/Heap';
export default function(worker, concurrency) {
// Start with a normal queue
var q = queue(worker, concurrency);
var processingScheduled = false;

q._tasks = new Heap();

Expand Down Expand Up @@ -55,7 +56,13 @@ export default function(worker, concurrency) {
q._tasks.push(item);
}

setImmediate(q.process);
if (!processingScheduled) {
processingScheduled = true;
setImmediate(() => {
processingScheduled = false;
q.process();
});
}
};

// Remove unshift function
Expand Down