b.Run(fmt.Sprintf("N%d", n), func(b *testing.B) {
			b.ReportAllocs()
			for i := 0; i < b.N; i++ {
				var bb Buffer
				for bb.Len() < n {
					bb.Write(block)
				}
			}
		})
	}
}

func BenchmarkBufferAppendNoCopy(b *testing.B) {
	var bb Buffer
	bb.Grow(16 << 20)
	b.SetBytes(int64(bb.Available()))
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		bb.Reset()

		desc := fmt.Sprintf("%q %q %q %d", tt.in, tt.old, tt.new, tt.n)
		var (
			in  = []byte(tt.in)
			old = []byte(tt.old)
			new = []byte(tt.new)
		)
		b.Run(desc, func(b *testing.B) {
			b.ReportAllocs()
			for b.Loop() {
				Replace(in, old, new, tt.n)
			}
		})
	}
}

type TitleTest struct {
	in, out string
}

var TitleTests = []TitleTest{
	{"", ""},

func BenchmarkMul(b *testing.B) { b.Run("P224", func(b *testing.B) { v := new(fiat.P224Element).One() b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { v.Mul(v, v) } }) b.Run("P384", func(b *testing.B) { v := new(fiat.P384Element).One() b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { v.Mul(v, v) } }) b.Run("P521", func(b *testing.B) { v := new(fiat.P521Element).One() b.ReportAllocs() b.ResetTimer() for i := 0; i < b.N; i++ { v.Mul(v, v) } }) } func BenchmarkSquare(b *testing.B) {...