# Common File Operation [GstarCAD 2018](Help%20System/GSTARCAD/2018/Index.md) → [User Guide](Help%20System/GSTARCAD/2018/User%20Guide/(User%20Guide).md) → [Additional Pages](Help%20System/GSTARCAD/2018/User%20Guide/Additional%20Pages/(Additional%20Pages).md) ## Common File Operation GstarCAD 2018 greatly improves the whole performance no matter in small drawings less than 10M or big drawings more than 100M. Compared with AutoCAD®2018, it has greater superirity in time spending and memory using. ![](Help%20System/GSTARCAD/2018/assets/GCAD_GUG/GCAD_GUG/pic/Common%20File%20Operation%201.jpg) Note: Percentage: GstarCAD2018 / AutoCAD®2018 Comparison of drawings: three levels of drawings in 10M / 50M / 100M --- Xi'an Gstarsoft Ltd