About the performance of named references / non-logical variable

Hi everybody,

I wonder about the performance of using a named reference compared of using
an additional argument of a predicate.  And how about a non-logical
variable?  Are they much slower?


Another question I ponder upon:

Do the constraint packages of ECLiPSe, e.g., ic use informed backtracking
techniques as backjumping and backmarking?  I guess not.

And it would be hard to implement them, wouldn't it?


Thanks, Uli
-- 
Ulrich Scholz

Personal Memory Group
European Media Laboratory GmbH