Optimized way of Querying in MongoDB using $in vs $or

Question

Implementing an application that looks up a table for mail id presence from a list of around 10 email ids. Tried using $or and $in.

$in seems to give better performa

Answer 1

"While "$or"will always work, use "$in"whenever possible as the query optimizer handles it more efficiently."

Moreover "$in" has more readability.

Ref: MongoDB: The Definitive Guide