return "", 1, hasAlloc, nil
	case "heap":
		return "v2", period / 2, hasAlloc, nil
	default:
		return "", 0, false, errUnrecognized
	}
}

// parseHeapSample parses a single row from a heap profile into a new Sample.
func parseHeapSample(line string, rate int64, sampling string, includeAlloc bool) (value []int64, blocksize int64, addrs []uint64, err error) {
	sampleData := heapSampleRE.FindStringSubmatch(line)