ASP.NET Core MiniProfiler

The ASP.NET Core MiniProfiler is a lightweight profiler that helps developers debug performance issues in their applications. It allows developers to see the time spent on each database query, web request, or other operation.

Installation

To install the MiniProfiler, simply add the following NuGet package to your .NET Core project:

dotnet add package MiniProfiler.AspNetCore

Configuration

To use the MiniProfiler, you need to add it to the middleware pipeline in your Startup.cs file:

app.UseMiniProfiler();

You can also configure the MiniProfiler to use a specific storage provider, such as Redis, by adding the following code to your Startup.cs file:

services.AddMiniProfiler(options => {
    options.Storage = new RedisStorage("<connection string>");
});

Usage

Once you have configured the MiniProfiler, you can start using it in your code by adding the following code to your action method:

public IActionResult Index()
{
    using (MiniProfiler.Current.Step("My action"))
    {
        // code to be profiled
    }

    return View();
}

This will create a new profiling step called "My action" and time how long it takes to execute the code inside the using block.

You can also profile your database queries by wrapping them in a MiniProfiler.Current.CustomTiming() block:

using (MiniProfiler.Current.Step("My action"))
{
    using (var connection = new SqlConnection("<connection string>"))
    {
        connection.Open();

        using (var command = connection.CreateCommand())
        {
            command.CommandText = "SELECT * FROM Customers";

            using (MiniProfiler.Current.CustomTiming("SQL", command.CommandText))
            {
                var dataReader = command.ExecuteReader();

                // code to read from the data reader
            }
        }
    }
}

Conclusion

The ASP.NET Core MiniProfiler is a powerful yet lightweight profiler that can help you debug performance issues in your application. By following the steps outlined above, you can easily add the MiniProfiler to your application and start identifying performance bottlenecks.