I'm running Drools 7.10.0-FINAL Fusion on a linux(openembedded) box (single core 600MHz, 512MB RAM, Java SE Embedded 1.8) and looking for the ways I can improve Drools startup time. It's around ~32s now, would be good to halve it.
I have a single .drl file with two simple rules in a kjar module I'm building with kie-maven-plugin as mvn clean install -DgenerateModel=YES -e
Starting session as
1 KieServices ks = KieServices.Factory.get();
2 //this is slower KieContainer kContainer = ks.getKieClasspathContainer();
3 ReleaseId releaseId = ks.newReleaseId("...", "KnowledgeBase", "1.0");
4 KieContainer kContainer = ks.newKieContainer(releaseId);
5 this.kieSession1 = kContainer.newKieSession();
The times I'm getting
1 06:11:06,141 INFO (ServiceDiscoveryImpl.java:107) Loading kie.conf from jar:!/META-INF/kie.conf in classloader sun.misc.Launcher$AppClassLoader@387f44
2 06:11:06,591 INFO (ServiceDiscoveryImpl.java:141) Adding Service org.drools.compiler.kie.builder.impl.KieServicesImpl
3 06:11:06,890 INFO (ServiceDiscoveryImpl.java:141) Adding Service org.drools.compiler.builder.impl.KnowledgeBuilderFactoryServiceImpl
4 06:11:06,969 INFO (ServiceDiscoveryImpl.java:141) Adding Service org.drools.core.io.impl.ResourceFactoryServiceImpl
5 06:11:07,065 INFO (ServiceDiscoveryImpl.java:141) Adding Service org.drools.core.marshalling.impl.MarshallerProviderImpl
6 06:11:07,120 INFO (ServiceDiscoveryImpl.java:141) Adding Service org.drools.core.concurrent.ExecutorProviderImpl
7 06:11:07,140 INFO (ServiceDiscoveryImpl.java:107) Loading kie.conf from jar:drools-model-compiler-7.10.0.Final.jar!/META-INF/kie.conf in classloader sun.misc.Launcher$AppClassLoader@387f44
8 06:11:07,280 INFO (ServiceDiscoveryImpl.java:141) Adding Service org.drools.modelcompiler.CanonicalKieModuleProvider
9 06:11:07,452 DEBUG (KieRepositoryImpl.java:89) Cannot load a KieRepositoryScanner, using the DummyKieScanner
10 06:11:07,489 DEBUG (KieRepositoryImpl.java:130) KieModule Lookup. ReleaseId KnowledgeBase:1.0 was not in cache, checking classpath
11 06:11:07,522 INFO (KieRepositoryImpl.java:184) Adding KieModule from classpath: file:KnowledgeBase-1.0.jar
12 06:11:07,788 DEBUG (ClasspathKieProject.java:397) KieModule URL type=jar url=KnowledgeBase-1.0.jar
13 06:11:20,511 DEBUG (ClasspathKieProject.java:265) Found and used pom.properties META-INF/maven/.../KnowledgeBase/pom.properties
14 06:11:38,421 INFO (RuleEngineModule.java:95) KieSession started
most of the time (log entries 7-13) is spent in KieContainer kContainer = ks.newKieContainer(releaseId);
Any known techniques or educated guesses how to speed-up kie container instantiation?
