===== Openssl =====
  * threads: by default, one single thread
  * openssl speed -evp aes-256-cbc -seconds 30
  * openssl speed -evp md5 -seconds 30
  * openssl speed -evp sha1 -seconds 30
  * openssl speed -evp blowfish -seconds 30
  * CPUs
    * Thinkpad T590: Intel(R) Core(TM) i7-8665U CPU @ 1.90GHz / cache 8MB
    * Thinkpad L480: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz
    * Raspi4: ARMv7 Processor rev 3 (v7l)

^                      ^Thinkpad L480^Thinkpad T590^  Raspi4/2GB^
|power unloaded        |  14.7V/0.24A|    20V/0.24A| 5.13V/0.45A|
|  power loaded        |     14.8V/1A|  19.8V/0.96A|   5.1V/0.6A|
|power 180s aes-256-cbc|        49mAh|        50mAh|       29mAh|
|power 180s         md5|        59mAh|        57mAh|       28mAh|
|power 180s        sha1|        59mAh|        58mAh|       29mAh|
|power 180s    blowfish|        42mAh|        51mAh|       28mAh|

=== comparisons ===
  * In average, the raspi4 can with a given energy ration perform 28% of the operations the Intel-cpu does with the same energy.

^         operation^ Raspi4 ops/1Ah^L480 ops/1Ah^ T590 ops/1Ah^ rasp/L480/T590^
| aes-256-cbc/16 |3292401586 |24711773061 |31714790020 |10/78/100|
| aes-256-cbc/64 |969046965 |8092097775 |10628769460 |9/76/100|
| aes-256-cbc/256 |256706034 |1920037673 |2704543280 |9/71/100|
| aes-256-cbc/1024 |65067206 |498613326 |680486020 |10/73/100|
| aes-256-cbc/8192 |8178206 |64374142 |85161620 |10/76/100|
| aes-256-cbc/16384 |4084793 |30866836 |42560780 |10/73/100|
| md5/16 |1217313931 |2119177966 |2924735912 |42/72/100|
| md5/64 |983937379 |1497821796 |2055204052 |48/73/100|
| md5/256 |611057586 |791974440 |1085190280 |56/73/100|
| md5/1024 |240890517 |265666203 |362701350 |66/73/100|
| md5/8192 |36264689 |37956983 |52446000 |69/72/100|
| md5/16384 |18356103 |18432576 |26515859 |69/70/100|
| sha1/16 |1070218517 |2265775322 |3154136844 |34/72/100|
| sha1/64 |812152965 |1658257694 |2295823155 |35/72/100|
| sha1/256 |462847137 |968104796 |1325580413 |35/73/100|
| sha1/1024 |170651103 |373194508 |504245775 |34/74/100|
| sha1/8192 |24691655 |55136101 |73092051 |34/75/100|
| sha1/16384 |12499724 |27081423 |37544017 |33/72/100|
| bf-cbc/16 |2810214103 |5007196047 |5550593549 |51/90/100|
| bf-cbc/64 |820344172 |1355485523 |1544094901 |53/88/100|
| bf-cbc/256 |213662586 |343794928 |395014137 |54/87/100|
| bf-cbc/1024 |54059586 |86783023 |99223333 |54/87/100|
| bf-cbc/8192 |6833034 |11045738 |12001960 |57/92/100|
| bf-cbc/16384 |3422896 |5553666 |6232901 |55/89/100|