When you work with very large models or use a lot of diagrams at a time, the performance of MagicDraw may become slow. To increase an efficiency of modeling, we suggest the following solutions:

• Increase a java heap size.
• Do not keep unused diagrams open. Open project without loading diagrams. Your projects will be opened over a shorter period of time without opening a diagram as well as use less memory.
• Increase an active validation period. MagicDraw takes less memory with increased active validations period.
• Split the project to read only modules. Keep read only modules not loaded. This may help only if your project contains several parts with minimal dependencies between them.
• Use Garbage Collector to free unused memory.
• Turn of antivirus. Some antivirus software can cause significant performance decrease on project open and other actions.

For more information see "MagicDraw User Manual" > "Performance Improvement" section. Manual is available in < MagicDraw installation directory > \manual\