[rules-users] Insert Fact Speed bottleneck

[Mark Proctor]

On 05/05/2010 09:19, djb wrote:
> Hi Drools team,
>
> I wrote a Drools application for my company, which evaluates clinical claim
> processing rules.  That is, it checks current medical claims against the
> patient's historical claims.
>
> It appears that 95% of the run time is dedicated to inserting facts, which
> is presumably when it propagates through the RETE graph, since firing the
> rules takes no time.
>
> But it seems like it's not fast enough.  I made a rule template, which by
> trial and error of moving the conditions around, is optimised.  I'm
> averaging 310ms, and need it to be under 170ms for it to be viable.
>
> Is there any not-too-technical guide to optimisation somewhere?  (alpha and
> beta-nodes scare me a bit).
>    
Other than writting the rules well - using == constraints, avoiding 
cross products ete, there isn't much more you can do. If you have time 
you can work with us on the next generation engine, which will emit 
compiled java code, should be about 3 to 5 times faster. But the core 
team aren't working on that quite yet, just ideas in our head.

Mark
> Regards,
> Daniel
>
>
>