How add async functions to queue?

I am trying to add an async function to the queue. While the function is executed, the task appears to stay in the queue. e.g. the queue length remains at 1.

Here is some example code:

const Queue = require('queue');
const queue = new Queue({ autostart: true });

async function output() {
    console.log('hi');
}

queue.push(async (cb) => {
    await output();
    cb();
});

What am I missing?

[jessetane]

ah makes sense, your example didn’t show any concurrency limit so i assumed you wanted parallel execution (which is what Promise.all is good at)

[ErikKalkoken]

My use case is that I have a task that must only have one instance running at a time. I am using a queue with concurrency = 1 to ensure that.