LINQ Query Performance Degradation with Large Collections in .NET 6
I've hit a wall trying to I'm collaborating on a project where I tried several approaches but none seem to work. I'm sure I'm missing something obvious here, but I've been struggling with this for a few days now and could really use some help. I'm experiencing important performance optimization when executing a LINQ query on a large collection of objects in .NET 6. The collection consists of over 100,000 records, and I'm using the `Where` method followed by `Select`. However, the query takes an excessively long time to complete and seems to block the main thread. Here's the LINQ query I'm using: ```csharp var results = myCollection .Where(item => item.IsActive && item.CreatedDate > DateTime.UtcNow.AddMonths(-6)) .Select(item => new { item.Id, item.Name, DaysSinceCreated = (DateTime.UtcNow - item.CreatedDate).Days }) .ToList(); ``` I tried profiling the application and noticed that the LINQ query is causing a important spike in CPU usage. I also attempted to use `AsEnumerable()` before the filtering to see if that would help, but it didn't make a difference. Additionally, I have ensured that my collection is not being modified during the query execution, and I've checked for any potential deadlocks or resource contention. Does anyone have suggestions on how to improve the performance of this query or if there are best practices in LINQ that I might be overlooking? Also, are there specific LINQ methods that perform better with larger data sets? I want to avoid blocking the UI thread while fetching these records, and any insight would be appreciated. My development environment is macOS. My development environment is Ubuntu. Any ideas what could be causing this? My development environment is macOS. Am I missing something obvious? I've been using C# for about a year now. Could this be a known issue? I'm working in a CentOS environment. What's the correct way to implement this?