# Common File Operation [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [User Guide](Help%20System/GSTARCAD/2021/User%20Guide/(User%20Guide).md) → [Additional Pages](Help%20System/GSTARCAD/2021/User%20Guide/Additional%20Pages/(Additional%20Pages).md) <!-- help-structure:notice --> > **Source status:** This source topic has 1 recorded inherited issue(s). [Source issue details](../../Source%20Issues.md). <!-- /help-structure:notice --> ## 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. ![Missing source image: pic/Common%20File%20Operation%201.jpg](Help%20System/GSTARCAD/2021/assets/missing-source-image.svg) Note: Percentage: GstarCAD2018 / AutoCAD®2018 Comparison of drawings: three levels of drawings in 10M / 50M / 100M --- Gstarsoft Co.,Ltd