mongodb: how can I see the execution time for the aggregate command?

Question

I execute the follow mongodb command in mongo shell

db.coll.aggregate(...)

and i see the list of result. but is it possible to see the quer

Answer 1

You can add a time function to your .mongorc.js file (in your home directory):

function time(command) {
    const t1 = new Date();
    const result = command();
    const t2 = new Date();
    print("time: " + (t2 - t1) + "ms");
    return result; 
}

and then you can use it like so:

time(() => db.coll.aggregate(...))

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Caution

This method doesn't give relevant results for db.collection.find()