My Origin project file (OPJ) is very slow to work with. How can I improve this

You may try the following four approaches and improve the speed of your Origin project:

• Try clearing the Results Log. You can open it from the View menu, or use Alt-2 key. Right-click and choose Clear All. Prior to Origin 8.6, logging for many functions were enabled by default, for importing, and thus these entries can accumulate over time. Starting with 8.6, default was changed not to log such entries, but for older OPJ files, the log might have already been very big. Clearing a big Results Log can greatly improve OPJ loading and saving speed. You may want to save the Results Log contents of a Notes window, but most likely that is not necessary.
• OPJ files created with Origin version 8.5.1 might have some redundent internal objects(empty operations) saved unnecessarily. Later version of Origin had fixed this problem but the OPJ files may already contain many of these. You can try deleting the empty operations in the opj file. Click Window:Script Window to open the script window, run the script:

  del -op;

• If you have a big OPJ that you find it slow to work with periodically, it may be the result of Autosave. You can choose to turn off Autosave from Tools:Options and select the Open/Close tab. Uncheck Autosave.
• If you have hundreds of windows in a folder, try moving some into subfolders. You can also use Project Explorer to hide windows which reduces demand on system resources. (Note: Older versions of Origin had a View: View Windows : Windows in Active Folder & Subfolders menu option which has been removed, this menu option would cause problems when you organized large numbers of windows into subfolders and viewed the top level folder.)

Keywords: project slow slowness OPJ save open