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Reference
Preferences
Cell Options
Display Options
CellDisplayCache
• CellDisplayCache is an option for cells that determines if the contents of a cell are to be stored in memory to allow faster updating of the cell display.
• With the setting CellDisplayCache 
True, the contents of a cell are stored in a special cache so that the cell can be quickly redrawn. This option is often used for cells having complicated typesetting which can take a long time to redraw.
• The default setting is CellDisplayCache False.
