promClient, err := api.NewClient(api.Config{Address: address})
	if err != nil {
		return nil, fmt.Errorf("could not build prometheus client: %v", err)
	}
	return promv1.NewAPI(promClient), nil
}

func metrics(promAPI promv1.API, workload string, duration time.Duration) (workloadMetrics, error) {
	parts := strings.Split(workload, ".")
	wname := parts[0]
	wns := ""
	if len(parts) > 1 {