tcas

  "max-buffer-size": "25m"
  "mode": "non-blocking"

  - Make sure the DPI of the document is correct (e.g. 203dpi)
  - Make sure the document does not need to be scaled (and scaling to fit is disabled) (for 4x6 that means 812 x 1218 pixels max)
  - Make sure the document is black and white (no grayscale)

  pdfimages -all <input_file>.pdf <out_prefix>
  convert <generated_png>.png -filter point -density 203 -units PixelsPerInch out.png

  Cryptsetup
  #     Algorithm |       Key |      Encryption |      Decryption
          aes-cbc        128b       465.5 MiB/s       654.0 MiB/s
  
  OpenSSL Speed for ChaCha
  type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes  16384 bytes
  chacha20-poly1305    85242.48k   144024.55k   265936.64k   309418.33k   317977.94k   317658.45k

  Cryptsetup
  #     Algorithm |       Key |      Encryption |      Decryption
          aes-cbc        128b        18.9 MiB/s        31.9 MiB/s
  
  OpenSSL Speed for ChaCha
  type             16 bytes     64 bytes    256 bytes   1024 bytes   8192 bytes  16384 bytes
  chacha20-poly1305    24833.53k    55555.22k    90574.34k    99022.17k   102659.41k   100592.30k