Mongodb vs Postgresql - Which one performs better?

Thanks. My concern is actually i have read a lot of bad articles about mongo. But they are 4 years ago at least. They say mongo is unstable, randomly lose data sometimes simple query takes forever to execute etc…

But like i said they are from 2015 and before. Does mongo have this issues? What’s the current situation?

Edit: does postgres uses tables or jsonb for parse server?

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