}
		}
		x = append(x, v)
		s = s[i+1:]
	}
	if len(x)%2 != 0 {
		ok = false
		return
	}
	ok = true
	matched = true
	pos = x
	return
}

var text []byte

func makeText(n int) []byte {
	if len(text) >= n {
		return text[:n]
	}
	text = make([]byte, n)
	x := ^uint32(0)
	for i := range text {
		x += x
		x ^= 1
		if int32(x) < 0 {
			x ^= 0x88888eef
		}

			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
		data, err = os.ReadFile("../../testdata/Isaac.Newton-Opticks.txt")
		if err != nil {
			return nil, err

    function makeRect(cl, x, y, w, h) {
      const r = document.createElement('div');
      r.style.left = x+'px';
      r.style.top = y+'px';
      r.style.width = w+'px';
      r.style.height = h+'px';
      r.classList.add(cl);
      return r;
    }

    // Background
    const w = box.width - 1; // Leave 1px gap
    const r = makeRect('boxbg', box.x, box.y, w, ROW);