The more skiplist items you have the more of a performance hit you will encounter. There is no set limit to the number of items you can have. I would not recommend a skiplist of 10k items. 
 
You'll want to make sure the option "Display skip items in <color>" is disabled as this requires immediate pattern matching on the file listing. Rather then on transfer. 
 
An ideal skiplist would be less than 100 items as far as performance goes.
		 
		
		
		
		
		
		
		
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