title: 7zip Fastest LZMA2 compression
body: <p>How can I convert these settings into a command?</p>
  
  <p><img src="https://i.stack.imgur.com/FQska.jpg" alt="Screenshot of the options on archive creation"></p>
  
  <pre><code>Archiv format:7z
  compression level: Fastest
  Compression method: LZMA2
  Dictionary size: 64kb
  Word size: 32
  Solid Block size: 8MB
  Number of CPU threads: 30
  </code></pre>
  
  <p>I tried this:</p>
  
  <pre><code>"7z.exe" a -t7z "F:\BACKUP" "D:\Source" -m0=LZMA2:d=64k
  </code></pre>
  
  <p>The compression is good but it takes three hours, instead of 1 hour when using the GUI. I looked at the documentation but I couldn't figured it out.</p>