EcN     int
						}
					}
					var ei erasureInfo
					if err := json.Unmarshal(buf.Bytes(), &ei); err == nil && ei.V2Obj != nil {
						verID := uuid.UUID(header.VersionID).String()
						if verID == "00000000-0000-0000-0000-000000000000" {
							// If the version ID is all zeros, use the signature as version ID.
							verID = fmt.Sprintf("null/%08x", header.Signature)
							v0 = verID
						}
						idx := ei.V2Obj.EcIndex

	b.Run(" 000000|XXXXXX ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 0, 6, size, b) })
	b.Run(" XXX000|XXX000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 3, 3, size, b) })
	b.Run(" XXXXXX|000000 ", func(b *testing.B) { benchmarkErasureDecode(6, 6, 6, 0, size, b) })
}

func BenchmarkErasureDecode_16_40MB(b *testing.B) {
	const size = 40 * 1024 * 1024

}

func BenchmarkErasureEncode_16_40MB(b *testing.B) {
	const size = 40 * 1024 * 1024
	b.Run(" 00000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 0, size, b) })
	b.Run(" 00000000|X0000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 0, 1, size, b) })
	b.Run(" X0000000|00000000 ", func(b *testing.B) { benchmarkErasureEncode(8, 8, 1, 0, size, b) })

	report()
	fatalErr(err)

	// At this point the version stack must look as below,
	// v3 --> free version      00000000-0000-0000-0000-0000000000f2 (from removal of null version)
	// v2 --> free version      00000000-0000-0000-0000-0000000000f1 (from overwriting of null version )
	// v1 --> non-free version  00000000-0000-0000-0000-000000000001

	// Check number of free-versions

	tmp[0] = 0xce // muint32
	binary.BigEndian.PutUint32(tmp[1:], uint32(xxhash.Sum64(dst[dataOffset:])))
	dst = append(dst, tmp[:5]...)
	return append(dst, x.data...), nil
}

const emptyUUID = "00000000-0000-0000-0000-000000000000"

func (x *xlMetaV2) findVersionStr(key string) (idx int, ver *xlMetaV2Version, err error) {
	if key == nullVersionID {
		key = ""
	}
	var u uuid.UUID
	if key != "" {