title: How to check if bytes array contains another array
body: <p>I've got a very long array of bytes, for example:</p>
  
  <pre><code>Byte[] bytes = {90, 80, 63, 65, 70 ...};
  </code></pre>
  
  <p>It's nearly 20-30 Mb (theoretically). Is there a fast way to check if this array contains another array, for example:</p>
  
  <pre><code>Byte[] small = {63, 80, 75, 77};
  </code></pre>
  
  <p>First, I need find bytes in that order which they was defined in small array. Second, I need find array in another array not any byte of small array.
  Thanks all to advance.</p>