Thank you for approaching us.
Ideally, there is no performance wise limitation with Ganib software in open-source release.
It seems that, some configurations are missing in ganib from your end or some other environment causing ganib to perfom slow.
If possible, could you please send full catalina log file and other backend versions like OS ditro/version, MySQL and tomcat?
Please, send us the details asap so we can help you to make ganib perform better.