{"id":402804,"date":"2023-11-14T15:09:48","date_gmt":"2023-11-14T14:09:48","guid":{"rendered":"https:\/\/blog.jetbrains.com\/?post_type=dotnet&p=402804"},"modified":"2024-01-26T13:04:19","modified_gmt":"2024-01-26T12:04:19","slug":"automatically-analyze-asp-net-core-performance-with-dynamic-program-analysis","status":"publish","type":"dotnet","link":"https:\/\/blog.jetbrains.com\/en\/dotnet\/2023\/11\/14\/automatically-analyze-asp-net-core-performance-with-dynamic-program-analysis","title":{"rendered":"Automatically Analyze ASP.NET Core Performance With Dynamic Program Analysis"},"content":{"rendered":"\n

Slow web pages may make your users or customers abandon your web application<\/a>, even before they\u2019ve had a proper look at it. You\u2019ve likely also been frustrated working with a web application that is slow to load.<\/p>\n\n\n\n

The good news is that the latest versions of ReSharper<\/a> and JetBrains Rider<\/a>\u2019s Dynamic Program Analysis<\/a> come with new inspections to help you find performance issues with your ASP.NET Core MVC, Razor Pages, and Razor ViewComponents \u2013 all without having to dive into a full-blown profiler!<\/p>\n\n\n\n

Let\u2019s take a look at those new performance inspections for applications targeting the ASP.NET Core framework.<\/p>\n\n\n\n

What is Dynamic Program Analysis (DPA)?<\/h2>\n\n\n\n

Before we dive into what\u2019s new, let\u2019s quickly recap what Dynamic Program Analysis (or DPA) is all about. DPA is a process that runs in the background of ReSharper and JetBrains Rider, and checks your application for various issues whenever you run it on your machine.<\/p>\n\n\n\n

DPA will check for issues with memory allocation<\/a> and database usage. It provides hints about allocations to large and small object heaps, but also informs you when a database query returns more rows than you expected, helping you trap N+1 queries and Cartesian explosions,<\/a> among other potential performance issues.<\/p>\n\n\n\n

DPA for ASP.NET Core applications<\/h2>\n\n\n\n

The ReSharper 2023.3 and JetBrains Rider 2023.3 releases now come with new inspections to make you aware of potential issues in your ASP.NET Core applications.<\/p>\n\n\n\n

When you see a red icon in your status bar, DPA has found a potential performance issue. Alternatively, you will see a warning in the editor gutter and highlighting in your code:<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

You can double-click the icon in the status bar (or press Alt+Enter<\/kbd> and then View ASP issues<\/strong>) to open a new tool window and see the inspections that were triggered. The different tabs will show potential issues with Memory Allocation, Database, or in this case, ASP.NET.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

For the IndexModel.OnGet()<\/code> Razor Page in the above application, DPA detected that the average execution time is over 7 seconds. Yikes!<\/p>\n\n\n\n

Much like the other inspections available in DPA, the inspections for ASP.NET Core applications will require you to look more closely at your source code (or use a full-scale profiler such as dotTrace<\/a> or dotMemory<\/a>). However, without having to do anything specific, DPA does make you aware of potential performance issues before your application goes to production.<\/p>\n\n\n\n

The new inspections in Dynamic Program Analysis that target ASP.NET Core frameworks are available in the Early Access Program for ReSharper<\/a> and JetBrains Rider<\/a>. Give them a try, and see if you can find any issues in your MVC actions, Razor Pages, or ViewComponents. As always, we welcome your feedback in the comments.<\/p>\n\n\n\n

Photo by Saffu<\/a> on Unsplash<\/a><\/em><\/p>\n","protected":false},"author":118,"featured_media":402850,"comment_status":"closed","ping_status":"closed","template":"","categories":[4992,1401],"tags":[8062,489,46,1978],"cross-post-tag":[],"acf":[],"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/dotnet\/402804"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/dotnet"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/types\/dotnet"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/users\/118"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/comments?post=402804"}],"version-history":[{"count":9,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/dotnet\/402804\/revisions"}],"predecessor-version":[{"id":402880,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/dotnet\/402804\/revisions\/402880"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/media\/402850"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/media?parent=402804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/categories?post=402804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/tags?post=402804"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/en\/wp-json\/wp\/v2\/cross-post-tag?post=402804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}