Test example of mongo maxTimeMS option usage

mongo-timeouts.ts

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

// update according to your setup
const url = 'mongodb://localhost:27022';

const dbName = 'test';
const collectionName = 'test-timeouts';

const fillData = async () => {
    const client = new MongoClient(url);
    const data = Array.from({ length: 10000 }).map(() => ({
        name: 'John Doe',
        age: Math.floor(Math.random() * 100),
        created: new Date(),
        content: 'Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry\'s standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.',
    }));

    await client.connect();

    await client.db(dbName).collection(collectionName).insertMany(data);

    await client.close();
};

const catchAndLog = async (name, promise) => {
    try {
        console.time(name);
        const result = await promise;
        console.timeEnd(name);

        return result;
    } catch (e) {
        console.error(`${name} failed:`, e.message);
    }
};

(async () => {
    // uncomment to fill the collection with 10K docs for the first run
    // await fillData();

    const client = new MongoClient(url);

    const options = {
        maxTimeMS: 4, // on 10K docs generated by the fillData() all operations will fail with limit set to <= 4 ms
        // timeout: false, // useless, changing it from true to false does nothing
    };

    const collection = client.db(dbName).collection(collectionName);

    // any slow filter will do the job, so I got random timestamp
    const slowFilter = { created: '2024-01-08T13:18:16.456+00:00' };

    await catchAndLog('findOne', collection.findOne(slowFilter, options));
    await catchAndLog('find', collection.find(slowFilter, options).toArray());
    await catchAndLog('countDocuments', collection.countDocuments(slowFilter, options));
    await catchAndLog('updateOne', collection.updateOne(slowFilter, { $set: { updated: 1}}, options));
    await catchAndLog('updateMany', collection.updateMany(slowFilter, { $set: { updated: 1}}, options));
    await catchAndLog('deleteOne', collection.deleteOne({ ...slowFilter, updatedAt: new Date() }, options));
    await catchAndLog('deleteMany', collection.deleteMany({ ...slowFilter, updatedAt: new Date() }, options));

    await client.close();
})();

Test collection contained 10K docs.
Outcomes: With 4ms maxTimeMS all the operations fail. Even the commands like deleteOne and findOne. After rising maxTimeMS some of the commands pass.
Changing the timeout setting doesn't affect commands: they fail with 4 ms maxTimeMS disregarding of timeout value