title: LZ4 compressed text is larger than uncompressed
body: <p>I have read that lz4 algorithm is very fast and has pretty good compression. But in my test app compressed text is larger than the source text. What is the problem?</p>
  
  <pre><code>srand(time(NULL));
  std::string text;
  for (int i = 0; i &lt; 65535; ++i)
      text.push_back((char)(0 + rand() % 256));
  
  cout &lt;&lt; "Text size: " &lt;&lt; text.size() &lt;&lt; endl;
  
  char *compressedData = new char[text.size() * 2];
  int compressedSize = LZ4_compress(text.c_str(), text.size(), compressedData);
  
  cout &lt;&lt; "Compressed size: " &lt;&lt; compressedSize &lt;&lt; endl;
  </code></pre>
  
  <p>I also tried LZ4_compress, but result is the same. But if I generate string with same symbols or say with two different symbols, then compression is present.</p>