Connection pool wait queue processing is too greedy

const { MongoClient } = require('mongodb');

async function main(pid) {

  const client = new MongoClient('mongodb://localhost:27017/', { useNewUrlParser: true, useUnifiedTopology: true });

  await client.connect()

  const collection = client.db().collection('test');

  await collection.insertOne({ a: 42 });

  for (let counter = 0; counter < 100000; counter++) {

    collection.insertOne({ a: 42 }, _ => {});

  }

  await client.close();

}

main().catch(console.error);