}

	benchmarkEncrypt := func(size int, b *testing.B) {
		var (
			data      = make([]byte, size)
			plaintext = bytes.NewReader(data)
			context   = kms.Context{"key": "value"}
		)
		b.SetBytes(int64(size))
		for i := 0; i < b.N; i++ {
			ciphertext, err := Encrypt(KMS, plaintext, context)
			if err != nil {
				b.Fatal(err)
			}
			if _, err = io.Copy(io.Discard, ciphertext); err != nil {

			}
			bytes[i] = byte(limb)
			limb >>= 8
		}
	}
	return bytes
}

// SetBytes assigns x = b, where b is a slice of big-endian bytes.
// SetBytes returns an error if b >= m.
//
// The output will be resized to the size of m and overwritten.
func (x *Nat) SetBytes(b []byte, m *Modulus) (*Nat, error) {
	if err := x.setBytes(b, m); err != nil {
		return nil, err
	}
	if x.cmpGeq(m.nat) == yes {

	b.StopTimer()
	data := benchdata
	if random {
		data = benchrand
		if data[0] == 0 {
			for i := range data {
				data[i] = byte(rand.Intn(256))
			}
		}
	}
	b.StartTimer()
	b.SetBytes(int64(len(data)))
	for i := 0; i < b.N; i++ {
		New(data)
	}
}

func makeText(name string) ([]byte, error) {
	var data []byte
	switch name {
	case "opticks":
		var err error

	}
}

func BenchmarkWriteByte(b *testing.B) {
	const n = 4 << 10
	b.SetBytes(n)
	buf := NewBuffer(make([]byte, n))
	for i := 0; i < b.N; i++ {
		buf.Reset()
		for i := 0; i < n; i++ {
			buf.WriteByte('x')
		}
	}
}

func BenchmarkWriteRune(b *testing.B) {
	const n = 4 << 10
	const r = '☺'
	b.SetBytes(int64(n * utf8.RuneLen(r)))
	buf := NewBuffer(make([]byte, n*utf8.UTFMax))

		if err != nil {
			return nil, ErrDecryption
		}
		c, err = bigmod.NewNat().SetBytes(ciphertext, N)
		if err != nil {
			return nil, ErrDecryption
		}
		m = bigmod.NewNat().Exp(c, priv.D.Bytes(), N)
	} else {
		N = priv.Precomputed.n
		P, Q := priv.Precomputed.p, priv.Precomputed.q
		Qinv, err := bigmod.NewNat().SetBytes(priv.Precomputed.Qinv.Bytes(), P)
		if err != nil {
			return nil, ErrDecryption
		}

	if z.form == finite {
		if len(buf) < 10 {
			return errors.New("Float.GobDecode: buffer too small for finite form float")
		}
		z.exp = int32(byteorder.BeUint32(buf[6:]))
		z.mant = z.mant.setBytes(buf[10:])
	}

	if oldPrec != 0 {
		z.mode = oldMode
		z.SetPrec(uint(oldPrec))
	}

	if msg := z.validate0(); msg != "" {
		return errors.New("Float.GobDecode: " + msg)
	}

	return nil

func BenchmarkEncode(b *testing.B) {
	data := make([]byte, 8192)
	buf := make([]byte, StdEncoding.EncodedLen(len(data)))
	b.SetBytes(int64(len(data)))
	for i := 0; i < b.N; i++ {
		StdEncoding.Encode(buf, data)
	}
}

func BenchmarkEncodeToString(b *testing.B) {
	data := make([]byte, 8192)
	b.SetBytes(int64(len(data)))
	for i := 0; i < b.N; i++ {
		StdEncoding.EncodeToString(data)
	}
}

	for _, n := range sizes {
		if isRaceBuilder && n > 4<<10 {
			continue
		}
		b.Run(valName(n), func(b *testing.B) {
			if len(bmbuf) < n {
				bmbuf = make([]byte, n)
			}
			b.SetBytes(int64(n))
			f(b, n)
		})
	}
}

var indexSizes = []int{10, 32, 4 << 10, 4 << 20, 64 << 20}

var isRaceBuilder = strings.HasSuffix(testenv.Builder(), "-race")

const p256CompressedLength = 1 + p256ElementLength

// SetBytes sets p to the compressed, uncompressed, or infinity value encoded in
// b, as specified in SEC 1, Version 2.0, Section 2.3.4. If the point is not on
// the curve, it returns nil and an error, and the receiver is unchanged.
// Otherwise, it returns p.
func (p *P256Point) SetBytes(b []byte) (*P256Point, error) {

		panic("ed25519: bad public key length: " + strconv.Itoa(l))
	}

	if len(sig) != SignatureSize || sig[63]&224 != 0 {
		return false
	}

	A, err := (&edwards25519.Point{}).SetBytes(publicKey)
	if err != nil {
		return false
	}

	kh := sha512.New()
	if domPrefix != domPrefixPure {
		kh.Write([]byte(domPrefix))
		kh.Write([]byte{byte(len(context))})
		kh.Write([]byte(context))