}
}

func BenchmarkMarshalMsgversionsHistogram(b *testing.B) {
	v := versionsHistogram{}
	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		v.MarshalMsg(nil)
	}
}

func BenchmarkAppendMsgversionsHistogram(b *testing.B) {
	v := versionsHistogram{}
	bts := make([]byte, 0, v.Msgsize())
	bts, _ = v.MarshalMsg(bts[0:0])
	b.SetBytes(int64(len(bts)))

// 1024B and 1MiB.
type sizeHistogramV1 [dataUsageBucketLenV1]uint64

// sizeHistogram is a size histogram.
type sizeHistogram [dataUsageBucketLen]uint64

// versionsHistogram is a histogram of number of versions in an object.
type versionsHistogram [dataUsageVersionLen]uint64

type dataUsageEntry struct {
	Children dataUsageHashMap `msg:"ch"`
	// These fields do no include any children.

// MarshalMsg implements msgp.Marshaler
func (z *versionsHistogram) MarshalMsg(b []byte) (o []byte, err error) {
	o = msgp.Require(b, z.Msgsize())
	o = msgp.AppendArrayHeader(o, uint32(dataUsageVersionLen))
	for za0001 := range z {
		o = msgp.AppendUint64(o, z[za0001])
	}
	return
}

// UnmarshalMsg implements msgp.Unmarshaler
func (z *versionsHistogram) UnmarshalMsg(bts []byte) (o []byte, err error) {