dotTrace

dotTrace is a performance profiling tool developed by JetBrains for analyzing the runtime behavior of .NET applications. It helps developers locate CPU bottlenecks, understand hot paths, and assess how code executes over time. By collecting method-level timings and calling sequences, dotTrace supports performance tuning across a range of .NET technologies, including desktop, web, and service applications.

It offers multiple CPU profiling modes, such as sampling for low overhead and tracing for detailed timing and call stacks. Timeline profiling visualizes thread activity and asynchronous operations, while the call tree and hot-path views highlight the most expensive methods. dotTrace can profile apps running on .NET Framework or .NET Core, and it supports attaching to a running process or launching an application under profiling. The tool integrates with Visual Studio, JetBrains Rider, and can be used as a standalone application.

Results are presented in interactive panes and reports, with per-method timings, aggregated statistics, and filtering options by module or namespace. Users can save profiling snapshots, compare runs, and export data to HTML or XML for sharing. While dotTrace focuses on CPU performance, it complements other JetBrains profilers for a broader performance analysis workflow.

Availability and licensing: dotTrace is a commercial product offered by JetBrains, available as part of ReSharper Ultimate and as a standalone profiler, with a trial period for evaluation.