Handling Performance Bottleneck in ASP.NET Core API with Entity Framework Core
I need some guidance on Hey everyone, I'm running into an issue that's driving me crazy. While developing a minimum viable product using ASP.NET Core 6 and Entity Framework Core 6, I've encountered significant performance issues when querying data from my PostgreSQL database. My endpoint to fetch user profiles is taking over 2 seconds, which is unacceptable for user experience. Here's the relevant code snippet for the query: ```csharp public async Task<IActionResult> GetUserProfiles(int page, int pageSize) { var users = await _context.Users .Skip((page - 1) * pageSize) .Take(pageSize) .ToListAsync(); return Ok(users); } ``` Although pagination is implemented, it seems like the issue arises when fetching related data. Each user profile includes navigation properties to their posts and comments. I suspect that lazy loading might be causing N+1 query problems since I didn't explicitly include related data in my query. Testing with eager loading using `.Include()` improved performance a bit, but the query still feels sluggish. Here's what I tried: 1. **Eager Loading**: Implemented `.Include()` for related entities but it didn't fully resolve the performance issue. ```csharp var users = await _context.Users .Include(u => u.Posts) .Include(u => u.Comments) .Skip((page - 1) * pageSize) .Take(pageSize) .ToListAsync(); ``` 2. **Database Indexes**: I added indexes on frequently queried fields, but the performance improvement was minimal. 3. **Profiling**: Using SQL Profiler, I noticed that the query generated by EF Core is not optimized. It includes multiple joins which could be leading to performance degradation. Iām considering adopting a caching strategy using Redis to cache frequently accessed profiles. Before proceeding, I want to ensure that I'm not missing any optimizations at the query or database level. Any suggestions on best practices to enhance the performance of this endpoint or alternative approaches I could explore? I'm working on a service that needs to handle this. I'd really appreciate any guidance on this. This is my first time working with C# latest. For context: I'm using C# on Ubuntu 22.04. Could this be a known issue?