see the topic G-Code Optimizers?
and from google:
https://www.google.com/search?q=gcode+optimizer
https://xyzbots.com:4000/gcode-optimizer/ and
https://cnc-apps.com/en/app/optimizegcode
http://www.cuteminds.com/en/il-software/freeware-per-pcb/78-gcode-path-optimizer
https://hackaday.io/project/4955-g-code-optimization
David Lang