fisher install jorgebucaran/spark.fish

$ spark 1 2 4 8
▁▂▄█

$ seq 64 | sort --random-sort | spark
▅▄▂▇▂▅▆▄▃█▂▅▄▁▆▆▃█▄▁▇▅▂▃▇▃▃▄▇▄▅▆▇▂▅▁▇▁▄▂▆▅▃█▇▆▆▅▆▃▄▄▇▃▂▇█▅▃█▁▂▂▆

$ seq 10 20 | spark
▁▂▂▃▄▄▅▆▇▇█
$ seq 10 20 | spark --min=0
▄▅▅▆▆▆▇▇▇██
$ seq 10 20 | spark --min=0 --max=30
▃▄▄▄▄▄▅▅▅▅▆

$ awk \$0=length (functions --details spark) | spark
▃▆▃▃▃▄▃▂▄▄▄▅▂▄▅▂▆▁▅▂▅▅▃▂▂▆▃█▂▁▁▁

$ git shortlog --summary | string match --regex "\d+" | spark
█▁▁▁▃▁▁▄▁▁▁

$ ps -A | string replace --filter --regex -- ".*(\d+):(\d+).*" "\$1 * 3600 + \$2 * 60" | bc | spark
▇▁▂▁▆▁▂▂▁▃▁▃▁▁▁▆▁▁▁▂▁▃▂▁▁▃▁▁▁▁▁▂▁▁▂▁▁▁▁▁▆▂▃▂▁▂▃▁▆▁▁▁▂▁▁▁▁▃▂▂▁▇▁▁▁▁▆

$ git diff @~7 --numstat | string replace --regex -- "(^\d+).*" "\$1" | spark
▁▁▁▁▁▁▁▁▂▁▁▁▁▁▁▂▂▃█▄▁▁

▆▄▂▁▂▄▆▇█▇▆▄▂▁▂▄▆▇█▇▆▄▂▁▂▄▆▇█▇▆▄▂▁▂▄▆▇█▇▆▄▂▁▂▄▆▇█▇▆▄▂▁▂▄▆▇█

$ time seq 2000 | sort --random-sort | spark
________________________________________________________
Executed in   27.21 millis    fish           external
   usr time   26.40 millis    0.57 millis   25.83 millis
   sys time    4.87 millis    1.58 millis    3.29 millis
$ time seq 2000 | sort --random-sort | spark.sh
________________________________________________________
Executed in    2.73 secs    fish           external
   usr time    2.72 secs    0.33 millis    2.72 secs
   sys time    0.02 secs    1.47 millis    0.02 secs