return trace.MutatorUtilizationV2(parsed.events, flags), nil
	}

	mux := http.NewServeMux()

	// Main endpoint.
	mux.Handle("/", traceviewer.MainHandler([]traceviewer.View{
		{Type: traceviewer.ViewProc, Ranges: ranges},
		// N.B. Use the same ranges for threads. It takes a long time to compute
		// the split a second time, but the makeup of the events are similar enough