}
		// Accumulate groups by Name.
		groupsByName := make(map[string]goroutineGroup)
		for _, summary := range summaries {
			group := groupsByName[summary.Name]
			group.Name = summary.Name
			group.N++
			group.ExecTime += summary.ExecTime
			groupsByName[summary.Name] = group
		}
		var groups []goroutineGroup
		for _, group := range groupsByName {
			groups = append(groups, group)
		}