Optimizing JSON Parsing for High-Volume REST API Responses in Go
Does anyone know how to I'm working through a tutorial and I recently switched to I've been banging my head against this for hours... Currently developing a high-traffic REST API in Go, I need to ensure that my JSON parsing is efficient, especially when handling large datasets. My endpoint returns user data in the following format: ```json { "users": [ { "id": 1, "name": "Alice", "email": "alice@example.com" }, { "id": 2, "name": "Bob", "email": "bob@example.com" } ] } ``` While using the `encoding/json` package, I've implemented the following struct for unmarshalling: ```go type User struct { ID int `json:"id"` Name string `json:"name"` Email string `json:"email"` } type Response struct { Users []User `json:"users"` } ``` After profiling, I noticed that parsing times spike when the number of users exceeds 1,000 entries. I've tried using `json.Decoder` to stream the parsing, but it seems that the bottleneck is still the struct unmarshalling. Here’s a snippet of what I’ve been testing: ```go func getUsers(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "application/json") var response Response decoder := json.NewDecoder(r.Body) if err := decoder.Decode(&response); err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } // Process users... } ``` While the code works, the latency isn’t acceptable for our expected load. Considering that we may serve thousands of requests per second, I'm looking for ways to optimize performance further. Has anyone faced similar challenges with `encoding/json`, or maybe switching to a different library like `jsoniter` might yield better results? Any insights on best practices for scaling JSON parsing in Go would be greatly appreciated. This is part of a larger web app I'm building. My development environment is Ubuntu. Any ideas what could be causing this? This issue appeared after updating to Go LTS. I appreciate any insights! The project is a desktop app built with Go. Could this be a known issue? This is for a CLI tool running on Linux. I recently upgraded to Go 3.9. What are your experiences with this?