Clojurians Log v2

Hey all! I made this for a project at work https://gitlab.com/vise890/parseq and i'd love to get some feedback on ways to make it better / faster . I tried other approaches (instaparse, spec), but they were even slower

in particular, i'd like to know if https://gitlab.com/vise890/parseq/blob/master/src/parseq/combinators.clj#L70 retains the head (i'm pretty sure it does) and how can i make it not do that. Any other tip on how to make many+ / many* go faster would be appreciated