From: derek@_NOSPAM_knosof.co.uk   
      
   Pertti,   
      
   > Derek M. Jones wrote   
   >> If you mean number of times values appear in source code,   
   >   
   > Sorry for formulating my question ambiguously. I am looking   
   > for statistical data on the number of times a value that is   
   > defined (stored in a register or memory) is subsequently used   
   > (read from the register or memory location) in the course of   
   > a computation.   
      
   By value do you mean object (see Figure 721.1) or specific   
   value (not sure I can help).   
      
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