Default value for priority doesn't get applied
According to the documentation, when priority is left undefined, it should default to 0. However this doesn't seem to be the case.
Instead, the promises seem to be executed in a random order (not the order they were inserted into the queue in!).
When manually setting the priority to 0, the queue behaves as expected.
Example code:
import PQueue from "p-queue";
function delay(ms: number) {
return new Promise((resolve) => setTimeout(resolve, ms));
}
function addToQueue(name: string, priority?: number) {
console.log(`adding ${name} to queue`);
return queue.add(
async () => {
await delay(1000);
console.log(`finished ${name}`);
return Promise.resolve();
},
{ priority }
);
}
const queue = new PQueue({ concurrency: 1 });
const first = addToQueue("first");
const second = addToQueue("second");
const priority = addToQueue("priority", 1);
const third = addToQueue("third");| Example output | Expected output |
|---|---|
| adding first to queue | adding first to queue |
| adding second to queue | adding second to queue |
| adding priority to queue | adding priority to queue |
| adding third to queue | adding third to queue |
| finished first | finished first |
| finished third | finished priority |
| finished priority | finished second |
| finished second | finished third |
sindresorhus / p-queue
Promise queue with concurrency control
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