From: Albert_Rich@msn.com   
      
   On Saturday, January 17, 2015 at 11:59:07 AM UTC-10, clicl...@freenet.de wrote:   
      
   > Just wondering: How long does the loading of Rubi into Mathematica   
   > roughly take? Perhaps the loss of time can be avoided by saving an   
   > internal representation? What is the experience of other users?   
      
   I apologize for the long time required to load Rubi 4.6's 5800+ rules and then   
   modify them to allow for showing integration steps.   
      
   On my desktop computer it takes about 132 seconds to load and modify the   
   rules.  If the control variable ShowSteps is set to False at the beginning of   
   the file Rubi4.6.nb, it takes 85 seconds to load just the rules, about a 35%   
   time reduction at the    
   price of not being able to show integration steps.   
      
   When Rubi 5 is released, it will require only a few seconds to load since the   
   rules will be stored as an extremely concise if-then-else decision tree (not   
   to mention being able to integrate expressions a couple orders of magnitude   
   faster AND making it    
   relatively easy to port to other computer algebra systems).  Stay tuned!   
      
   Albert   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)