The current implementation is merely a first prototype. It needs 
several enhancements before we can consider it a serious competitor to 
Prolog systems with mature tabling such as XSB, YAP and B-Prolog. In 
particular,
- The performance needs to be improved.
- Memory usage needs to be reduced.
- Tables must be shared between threads, both to reduce space and 
avoid recomputation.
- Tables must be invalidated and reclaimed automatically.
- Notably XSB supports incremental tabling and well-founded semantics 
under negation.