[jboss-jira] [JBoss JIRA] (JBRULES-3367) Planner: score calculation with plain old Java

[Geoffrey De Smet (JIRA)]

Geoffrey De Smet created JBRULES-3367:
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             Summary: Planner: score calculation with plain old Java
                 Key: JBRULES-3367
                 URL: https://issues.jboss.org/browse/JBRULES-3367
             Project: Drools
          Issue Type: Feature Request
      Security Level: Public (Everyone can see)
          Components: drools-planner
            Reporter: Geoffrey De Smet
            Assignee: Geoffrey De Smet


Provide an plain old java alternative to score calculations, so the user has choice (= freedom):
- A) Drools score calculation (default). Does incremental calculation automatically, without extra code.
- B) Java non-incremental score calculation. Very easy to reuse existing score code, but not fast.
- C) Java incremental score calculation. Requires incremental boilerplate code, but experiments show that in some use cases (with little rules) it can be a 100 times faster than A) with drools 5.3. Note that undo-then and JIT compiling might change that number drastically in future drools versions.

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