GoLang-编码/json.Marshal或fmt.sprintf？

Question

Which would be faster?

data := fmt.Sprintf("{\"TEST\":3, \"ID\":\"%s\"}", Id)

OR json marshalling a struct like that?

Answer 1

Highly depends on what you're trying to do, you should benchmark it and see.

However for your very specific example, the fastest way is just use basic string concat like :

data := `{"TEST":3, "ID":"` + Id + `"}`