}
}

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))

	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")

a, m = m, a } if bytes.Compare(b, m) > 0 { b, m = m, b } M, err := NewModulus(m) if err != nil { t.Fatal(err) } A, err := NewNat().SetBytes(a, M) if err != nil { t.Fatal(err) } B, err := NewNat().SetBytes(b, M) if err != nil { t.Fatal(err) } A.Mul(B, M) ABytes := A.Bytes(M) mBig := new(big.Int).SetBytes(m) aBig := new(big.Int).SetBytes(a) bBig := new(big.Int).SetBytes(b) nBig := new(big.Int).Mul(aBig, bBig) nBig.Mod(nBig, mBig) nBigBytes := make([]byte, len(ABytes)) nBig.FillBytes(nBigBytes) if !bytes.Equal(ABytes,...