// Workers AI · dad joke modeWhy did CLR Profiler go to therapy? It had a lot of memory issues.

CLR Profiler
Original author	Microsoft
Stable release	4.5 / November 2012 (2012-11)
Written in	C#, C++
Operating system	Microsoft Windows
Platform	.NET Framework, .NET Compact Framework
Type	Memory profiler
License	MIT License
Website	www.microsoft.com/downloads/details.aspx?familyid=CD5AA57C-9CD1-45AB-AA4B-8DC586D30938&displaylang=en
Repository	github.com/microsoftarchive/clrprofiler/

CLR Profiler is a free and open-source memory profiler for the .NET Framework from Microsoft. It allows the user to investigate the contents of the managed heap, the behavior of the garbage collector, and the allocation patterns (including call-graph analysis) of the program being profiled.

Overview

The latest version, 4.5, released in November 2012, allows for profiling of .NET 2.0, 3.0, 3.5, 4.0 or 4.5 managed code as well as Silverlight apps. The source code was originally included under the Microsoft Limited Reciprocal License (MS-LRL) and hosted on CodePlex. It is now available on GitHub under the MIT License.

CLR Profiler is an intrusive tool; seeing a 10 to 100x slowdown in the application being profiled is not unusual. Therefore, it is not the right tool to find out where time is spent – use other profilers to profile the CPU usage of an application.

Releases

• CLR Profiler for .NET 4.5 (Supported .NET Framework versions: 4.5, 4.0, 3.5, 3.0, 2.0.)
• CLR Profiler for .NET 4.0
• Power Toys for .NET Compact Framework 3.5 (includes a NETCF CLR Profiler)
• CLR Profiler for .NET 2.0
• CLR Profiler for .NET 1.1

See also

• List of performance analysis tools
• AQtime
• OProfile

External links

• Original CLR Profiler Site
• CLR Profiler usage guide