Understanding How Looping Choices Affect Asynchronous Performance In my recent project, I needed to update a large number of records in a NoSQL database — over a thousand. Since updating them all at once wasn’t feasible and the process was asynchronous too, I decided to process them in smaller batches of 20 records each. I implemented this in a loop using forEach, where each set of 20 would be updated before moving on to the next set.