MongoDB get executionStats for aggregate query

Question

I am looking for a way to retrieve the executionStats for aggregations.

When using find(), I can retrieve them easily by using explain. Example output:

Answer 1

I was able to do it in the following way:

db.myUserCollection.explain("executionStats").aggregate([{$match: {firstName: "John"} }]);

Reference: https://jira.mongodb.org/browse/SERVER-19758