}
		tp := tparams.At(i)
		w.writeType(buf, tp)
		if withConstraints {
			buf.WriteByte(' ')
			w.writeType(buf, tp.Constraint())
		}
	}
	buf.WriteByte(']')
}

func (w *Walker) writeParams(buf *bytes.Buffer, t *types.Tuple, variadic bool) {
	buf.WriteByte('(')
	for i, n := 0, t.Len(); i < n; i++ {
		if i > 0 {
			buf.WriteString(", ")
		}
		typ := t.At(i).Type()
		if variadic && i+1 == n {

		return ""
	}
	var buf strings.Builder
	buf.WriteByte('?')
	keys := make([]string, 0, len(m))
	for k := range m {
		keys = append(keys, k)
	}
	sort.Strings(keys)
	for _, k := range keys {
		v := m[k]
		keyEscaped := url.QueryEscape(k)
		if buf.Len() > 1 {
			buf.WriteByte('&')
		}
		buf.WriteString(keyEscaped)
		buf.WriteByte('=')
		buf.WriteString(url.QueryEscape(v))
	}

		n, err := buf.Write(testBytes[0:1])
		if want := 1; err != nil || n != want {
			t.Errorf("Write: got (%d, %v), want (%d, %v)", n, err, want, nil)
		}
		check(t, "TestBasicOperations (4)", &buf, "a")

		buf.WriteByte(testString[1])
		check(t, "TestBasicOperations (5)", &buf, "ab")

		n, err = buf.Write(testBytes[2:26])
		if want := 24; err != nil || n != want {
			t.Errorf("Write: got (%d, %v), want (%d, %v)", n, err, want, nil)

	var buf bytes.Buffer
	for _, k := range headers {
		buf.WriteString(k)
		buf.WriteByte(':')
		switch {
		case k == "host":
			buf.WriteString(req.URL.Host)
			fallthrough
		default:
			for idx, v := range headerMap[k] {
				if idx > 0 {
					buf.WriteByte(',')
				}
				buf.WriteString(v)
			}
			buf.WriteByte('\n')
		}
	}
	canonicalHeaders := buf.String()

	// Get signed headers.

		if added > 0 || e != "" {
			if added > 0 {
				dst.WriteByte(SlashSeparatorChar)
			}
			dst.WriteString(e)
			added += len(e)
		}
	}

	if pathNeedsClean(dst.Bytes()) {
		s := path.Clean(dst.String())
		if trailingSlash {
			return s + SlashSeparator
		}
		return s
	}
	if trailingSlash {
		dst.WriteByte(SlashSeparatorChar)
	}
	return dst.String()
}

	var s strings.Builder
	if x&xlFlagFreeVersion != 0 {
		s.WriteString("FreeVersion")
	}
	if x&xlFlagUsesDataDir != 0 {
		if s.Len() > 0 {
			s.WriteByte(',')
		}
		s.WriteString("UsesDD")
	}
	if x&xlFlagInlineData != 0 {
		if s.Len() > 0 {
			s.WriteByte(',')
		}
		s.WriteString("Inline")
	}
	return s.String()
}

func BenchmarkWriterEmpty(b *testing.B) {
	b.ReportAllocs()
	str := strings.Repeat("x", 1<<10)
	bs := []byte(str)
	for i := 0; i < b.N; i++ {
		bw := NewWriter(io.Discard)
		bw.Flush()
		bw.WriteByte('a')
		bw.Flush()
		bw.WriteRune('B')
		bw.Flush()
		bw.Write(bs)
		bw.Flush()
		bw.WriteString(str)
		bw.Flush()
	}
}

func BenchmarkWriterFlush(b *testing.B) {