PerfView is a CPU and memory performance-analysis tool for Windows that helps developers isolate performance issues in applications, with particular strength in analyzing .NET runtime code.
The tool addresses the challenge of diagnosing where performance problems originate by collecting and visualizing performance traces. It works by leveraging Event Tracing for Windows (ETW) and EventPipe data collection mechanisms, then parsing and presenting that data through an interactive interface. This approach allows developers to see detailed CPU usage patterns, memory allocation behavior, and other runtime characteristics without requiring deep knowledge of low-level tracing infrastructure.
PerfView is most valuable for .NET developers working on Windows who need to investigate production or development performance issues. The tool suits scenarios ranging from simple CPU profiling to complex memory leak diagnosis. For developers who need programmatic access to trace data rather than interactive analysis, the underlying TraceEvent library provides an alternative approach. The README distinguishes between using PerfView itself for direct investigation versus using the TraceEvent library when you need to manipulate trace data through code.
The project maintains active engagement with users through its issue tracker, encouraging developers to document solutions back into the comprehensive Users Guide when questions prove broadly applicable. The tool includes built-in documentation accessible through the application's Help menu, reducing friction for new users. Development activity shows responsiveness to reported issues and a commitment to keeping the tool functional across supported Windows versions and .NET Framework versions.
