take a look at https://github.com/Enlik/misc/blob/master/entropy-by-size.pl
*Note* that it got broken with new equo (one that doesn't print options recursively with equo --help*), but it should work for your purposes when you have your ancient one. (Also, note I will "break" it for you and make it work with new version soon.) *equo --help has nothing to do with this script; I'm just providing a hint on how it can be checked
