Many of the .flf files in https://github.com/arsham/figurine/tree/master/bin mention figlet etc in their comments.

Also on any Linux distribution you will find figlet available from the default repositories. :)

http://www.figlet.org/

figlet + lolcat = figurine

I'm interested in the rainbow library (which does reference figlet https://github.com/arsham/rainbow/blob/master/README.md#see-...), but only to see if it's any faster than the painfully slow Ruby implementation of lolcat.

Well, the name came out of nowhere (sorry!). As for comparison with ruby, all I can say is figurine is a single binary, whereas ruby's lolcat requires ruby's VM.

There are a couple of benchmarks and you can run them with: $ go test -bench=.

Cool? Meaningless though