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kostis 2007-03-12 11:16:57 +00:00
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@ -1278,15 +1278,16 @@ perform code optimizations during runtime and our feeling is that LP
implementation has been left a bit behind times. We hold that this implementation has been left a bit behind times. We hold that this
should change. should change.
% %
Indeed, we see \JITI as only the first, albeit a very important, step Indeed, we see \JITI as only the first, albeit very important, step
towards effective runtime optimization of logic programs. towards effective runtime optimization of logic programs.
As presented, \JITI is a hybrid technique: index generation occurs As presented, \JITI is a hybrid technique: index generation occurs
during runtime but is partly guided by the compiler, because we want during runtime but is partly guided by the compiler, because we want
to preserve compile-time WAM-style indexing. More flexible schemes are to combine it with compile-time WAM-style indexing. More flexible
possible. For example, index generation can be fully dynamic (as in schemes are of course possible. For example, index generation can be
YAP), combined with user declarations, or use static analysis to be fully dynamic (as in YAP), combined with user declarations, or use
even more selective or go beyond fixed-order indexing. static analysis to be even more selective or go beyond fixed-order
indexing.
% %
Finally, note that \JITI fully respects Prolog semantics. Better Finally, note that \JITI fully respects Prolog semantics. Better
performance can be achieved in the context of one solution performance can be achieved in the context of one solution