Optimizing API Performance in ASP.NET Core Web API with MiniProfiler and Glimpse


ASP.NET Core Web API's performance using tools like MiniProfiler and Glimpse. These tools are excellent for profiling and gaining insights into your application's performance, which can help you identify bottlenecks and areas for improvement. Here's a detailed guide:

Step 1. Create a New ASP.NET Core Web API Project

Start by creating a new ASP.NET Core Web API project using Visual Studio or the .NET CLI.

Step 2. Install NuGet Packages

Install the necessary NuGet packages for MiniProfiler and Glimpse.

dotnet add package MiniProfiler.AspNetCore
dotnet add package Glimpse.AspNetCore

Step 3. Configure MiniProfiler and Glimpse

In your Startup.cs file, add the following configurations.

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Glimpse.Agent;
using Glimpse.Server;
using Glimpse;

Author: Sardar Mudassar Ali Khan
namespace MiniProfiler 
    public class Startup
        public Startup(IConfiguration configuration)
            Configuration = configuration;

        public IConfiguration Configuration { get; }

        public void ConfigureServices(IServiceCollection services)
            services.AddMiniProfiler(options =>
                options.PopupRenderPosition = StackExchange.Profiling.RenderPosition.Left;


        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)

Step 4. Profile API Actions

Now let's profile an API action using MiniProfiler. In your controller, add the MiniProfilerProfiling attribute to the action you want to profile.

using Microsoft.AspNetCore.Mvc;
using StackExchange.Profiling;

Author: Sardar Muadassar Ali Khan
namespace MiniProfiler.Controllers
    public class SampleController : ControllerBase
        private readonly SomeService _service;

        public SampleController(SomeService service)
            _service = service;

        public IActionResult ProfiledAction()
            using (MiniProfiler.Current.Step("Doing some work"))
                var result = _service.DoSomeWork();
                return Ok(result);

Step 5. Run the Application

Build and run your application. Access the API action you've profiled (/api/sample/profiled-action), and you should see the MiniProfiler UI at the bottom-left corner of the page. Click on it to get detailed information about the profiling results.

Step 6. Analyze and Optimize

With MiniProfiler's information, you can identify areas where your API's performance might be suboptimal. Look for areas with high execution times or excessive database queries. Optimize your code based on these findings.

Similarly, Glimpse provides insights into various aspects of your application's performance. Access the Glimpse UI by navigating to /glimpse.axd while running the application. This tool can provide additional insights into requests, dependencies, and more.

Remember that performance optimization is an iterative process. Profile, analyze, optimize, and repeat as needed to continually improve your API's performance.

This example showcases how to integrate and use MiniProfiler and Glimpse in an ASP.NET Core Web API project. Keep in mind that the specific implementations and UI may change over time, so it's a good idea to refer to the official documentation of these tools for the latest information.


Optimizing the performance of your ASP.NET Core Web API is a crucial step to ensure a responsive and efficient application. By utilizing tools like MiniProfiler and Glimpse, you can gain valuable insights into the execution of your API actions and identify areas for improvement. The integration of these tools involves several key steps:

  1. Project Setup: Begin by creating a new ASP.NET Core Web API project and installing the required NuGet packages for MiniProfiler and Glimpse.
  2. Configuration: Configure MiniProfiler and Glimpse in your Startup.cs file by adding the necessary services and middleware. This enables the tools to collect and display performance data.
  3. Profiling: Apply the MiniProfilerProfiling attribute to the specific API actions you want to profile. This enables MiniProfiler to track the execution time and interactions within those actions.
  4. Run the Application: Build and run your application. Access the profiled API actions to see the MiniProfiler UI at the bottom-left corner of the page. Click on it to access detailed profiling results.
  5. Analysis and Optimization: Analyze the profiling results to identify areas of high execution times, excessive database queries, or other performance bottlenecks. Use this information to optimize your code and improve the efficiency of your API.
  6. Glimpse Insights: Access the Glimpse UI by navigating to /glimpse.axd. This tool provides additional insights into requests and dependencies, further aiding your optimization efforts.

Remember that performance optimization is an ongoing process. Continuously profile, analyze, optimize, and refine your code to ensure that your ASP.NET Core Web API delivers optimal performance for your users. By leveraging the capabilities of MiniProfiler and Glimpse, you can achieve a well-tuned and responsive application that meets the demands of your users and delivers an excellent user experience.

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