CODEWITHSUNDEEP
droolsoptaplanner
Patrick
Patrick

Reputation: 53

Looking for ways to make Drools / Optaplanner faster

I am working on a capstone project using Optaplanner 6.2.0.CR4 and Drools to incrementally score the solution. The problem is pretty similar to Optaplanner's Nurse Rostering example, with a little added complexity. I was wondering if there were any common pitfalls that can slow down Drools that I could look for in my code. The solver runs the Construction Phase pretty quickly, but hits a wall when it gets to the local search phase. Drools is inserting a lot of additional stuff like counting work days per pay period, blocks of specific duration free time per pay period, etc and I'm thinking the way I wrote the rules might be the problem.

Upvotes: 1

Views: 350

Answers (1)

Geoffrey De Smet
Geoffrey De Smet

Reputation: 27327

See docs "Score performance tricks". Especially keep an eye out on your "average score calculation count per second". It should be above 1000, preferably above 10000.

Use the OptaPlanner benchmarker. It will be your best friend in this endevour, thrust me :)

Note: Ask yourself: What do you mean with "faster"? Do you want better results in the same time? Do you want the same results faster? And/Or do you want to scale out more? There might be trade-off choices to make there - use the OptaPlanner Benchmarker to see the pure gains on all 3 fronts, but also to visualize trade-offs between those 3 fronts.

Upvotes: 1

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