[rules-users] Cost of queries

[Mark Proctor]

David Cracauer wrote:
> Hi All,
> I'm wondering if anyone can tell me the relative performance impact of 
> queries.  Is it just the cost of matching facts against them ( regular 
> caching rules apply etc.)?
The query pattern, which is injected, is the root pattern. So it breaks 
ALL joins and these will have to be calculated, although you do benefit 
from the alpha (literal matching) having already been done.

Mark
>
> Thanks,
> Dave
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