Which version of CuteEditor are you using?
Have you set Editor.UseHttpHandlerCacheImages Property to true?
Editor.UseHttpHandlerCacheImages Property
By default Cute Editor will use HttpHandler process the image files on the server side. You can turn this feature off by setting this property to false.
By default, the Cute Editor loads all the functions, toolbars and menus. Most of our clients don't use the default configuration and the speed can be improved by disabled some buttons. Please check the article in the developer guide: How to change the layout of the toolbars?
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