SQL Server: Performance implementing Large JSON Data Inserts Using Entity Framework
I've been working on this all day and I'm working with important performance optimization when trying to insert large JSON data into a SQL Server database using Entity Framework Core (v5.0). The JSON data payload can be around 1MB and contains nested arrays, which I deserialize into a list of entities. When I attempt to bulk insert this data, it takes over 30 seconds, and I often get a timeout exception. I've configured my DbContext to use a command timeout of 120 seconds, but it still doesn't seem effective. I've tried different approaches, including using `AddRange()` and `SaveChanges()`, but it doesn't seem to improve the performance. I've also attempted to batch the inserts into smaller chunks (e.g., 100 records at a time), but that only marginally reduced the time taken, and it still feels inefficient. Here’s a simplified version of the code I’m using to insert the data: ```csharp var jsonData = File.ReadAllText("path_to_large_json_file.json"); var entities = JsonConvert.DeserializeObject<List<MyEntity>>(jsonData); dbContext.MyEntities.AddRange(entities); await dbContext.SaveChangesAsync(); ``` Furthermore, I enabled SQL Server logging and noticed that the generated SQL commands are being executed one by one, which could be contributing to the slowness. Is there a way to optimize this process in Entity Framework, or would using a direct SQL bulk insert method be more efficient? Has anyone encountered similar issues when dealing with large JSON data with Entity Framework? Any insights would be appreciated! This issue appeared after updating to C# 3.9. Is there a simpler solution I'm overlooking?