Hey! This tool looks really nice and Im starting to have performance concerns with the original 2d extras RuleTile. Are there some comparisons between this tool and the original?

The tool is built on 2D extras, so the performance won't be better. Since it has a lot of custom logic, it will be slower. You can see some comparisons in this Github issue: https://github.com/Vinark117/BetterRuleTiles-Support/issues/15#issuecomment-1986... (Look at the 2nd table)