response, err := s.client.Do(request)
	c.Assert(err, nil)
	c.Assert(response.StatusCode, 200)

	// Create a byte array of 5MB.
	// content for the object to be uploaded.
	data := bytes.Repeat([]byte("0123456789abcdef"), 5*humanize.MiByte/16)
	// calculate etag of the data.
	etagBase64 := getMD5HashBase64(data)

	buffer1 := bytes.NewReader(data)
	objectName := "test-1-object"

   * "12AB" is the four hexadecimal digits representing the 16-bit code unit.
   */
  private static String showCharacter(char c) {
    String hex = "0123456789ABCDEF";
    char[] tmp = {'\\', 'u', '\0', '\0', '\0', '\0'};
    for (int i = 0; i < 4; i++) {
      tmp[5 - i] = hex.charAt(c & 0xF);
      c = (char) (c >> 4);
    }
    return String.copyValueOf(tmp);
  }

				for i := 0; i < b.N; i++ {
					LastIndexAny(x[:k], cs[:j])
				}
			})
		}
	}
}

func BenchmarkTrimASCII(b *testing.B) {
	cs := "0123456789abcdef"
	for k := 1; k <= 4096; k <<= 4 {
		for j := 1; j <= 16; j <<= 1 {
			b.Run(fmt.Sprintf("%d:%d", k, j), func(b *testing.B) {
				x := Repeat([]byte(cs[:j]), k) // Always matches set