Hey Koders! 
I wanted to share something that might help anyone struggling with lag or freezing in Kodular when your project grows big — especially when it reaches ~8,000+ blocks Or screen 5 each 2k+ blocks. After hitting that, the block editor started lagging badly and sometimes became unresponsive. I searched for solutions and found none — so I experimented and found a trick that worked for me. 
what I did
- Opened my main (laggy) project.
- Used Export Screen to export the heavy screen that was causing the lag.
- Created a new project (fresh, empty).
- Imported the exported screen into the new project.
- After importing into the new project, I was able to edit everything again — the editor became responsive and fast.
- (If you make edits in the new project) Export the screen from the new project and import it back into the main project.
- Verify the screen works in the main project.
Important notes/cautio
- Make sure all extensions used on that screen are imported in both projects (main and new). Missing extensions will break components when importing.
- Back up your project(s) before exporting/importing screens — just in case.
- This worked for me and may help others facing heavy-editor lag. Your mileage may vary depending on project complexity and extensions.
Final words
If you’re seeing lag when your blocks get huge, try this export → import → edit → re-import loop. It brought my editor back to life and saved the project! 
Happy koding
