Trace is a tool for viewing trace files. Trace files can be generated with: Example usage: Generate a trace file with 'go test': View the trace in a web browser: Generate a pprof-like profile from the trace: Supported profile types are: Then, you can use the pprof tool to analyze the profile: Note that while the various profiles available when launching 'go tool trace' work on every browser, the trace viewer itself (the 'view trace' page) comes from the Chrome/Chromium project and is only actively tested on that browser.