MongoDB Efficiency: Find + Update or Remove + Insert?

Question

Just curious which of the following is more efficient if I want to "reset" a (single) document to its initial state if it exists, or create a new one if it doesn't.

Collection.remove({ initialField: "dirtyString" });
Collection.insert({ initialField: "initialString" });

or

let _id = Collection.findOne({ initialField: "dirtyString" });
Collection.update(_id, { initialField: "initialString" });

Thanks!

Answer 1

用单个命令执行所有操作有什么问题？

Collection.update({ initialField: "dirtyString" }, { initialField: "initialString"});