[jira] [Commented] (JENA-1026) listIndividuals performance issue

["Stian Soiland-Reyes (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-1026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14742305#comment-14742305 ] 

Stian Soiland-Reyes commented on JENA-1026:
-------------------------------------------

Number of individuals does not matter, with just one individual it still takes ~ 25 seconds.

Even a very significantly shrinked ontology (not-much-food.ttl) takes 10 seconds in ListIndividuals.





> listIndividuals performance issue
> ---------------------------------
>
>                 Key: JENA-1026
>                 URL: https://issues.apache.org/jira/browse/JENA-1026
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Ontology API
>    Affects Versions: Jena 3.0.0
>         Environment: Verified on Jena 3.0.1-SNAPSHOT (2015-09-13) w/ Ubuntu 14.04/x64, 4 cores i7-3520M, 16G ram, SSD disk, Open JDK 1.8.0_45-internal
>            Reporter: Stian Soiland-Reyes
>            Priority: Minor
>         Attachments: OntologiaDeAlimentos.owl, not-much-food.ttl
>
>
> As reported by Maria Clementina Latanzi on dev@jena 2015-09-12:
> {quote}
> I'm working with Jena. I have an ontology with no more than 50 individuals,
> and I use Jena to
> get individuals from Ontology by calling *listIndividual* (
> *com.hp.hpl.jena.ontology.OntModel.listIndividuals*). When I call this
> method, it's taking a lot of time up to 20 seconds. When debugging, it
> takes more than 1 minute to return. Other methods like *listClass *return
> instantly.
> {quote}
> {code}
> package testOnto;
> import java.io.InputStream;
> import java.util.ArrayList;
> import java.util.Iterator;
> import com.hp.hpl.jena.ontology.Individual;
> import com.hp.hpl.jena.ontology.OntClass;
> import com.hp.hpl.jena.ontology.OntModel;
> import com.hp.hpl.jena.rdf.model.ModelFactory;
> import com.hp.hpl.jena.rdf.model.Resource;
> import com.hp.hpl.jena.rdf.model.Property;
> import com.hp.hpl.jena.rdf.model.StmtIterator;
> import com.hp.hpl.jena.rdf.model.impl.StatementImpl;
> import com.hp.hpl.jena.shared.JenaException;
> import com.hp.hpl.jena.util.FileManager;
> import com.hp.hpl.jena.util.iterator.ExtendedIterator;
> public class onto {
> 	static String Ontofile =
> "C:/Users/Sig/Clemen/OntologiasArchivos/OntologiaIngesta.owl";
> 	public static void main(String[] args) {
> 		//crea ontologia
> 		OntModel m = ModelFactory.createOntologyModel();
> 		try {
> 			InputStream in =
> FileManager.get().open("C:/Users/Sig/Clemen/OntologiasArchivos/OntologiaDeAlimentos.owl");
>             if (in ==null) {
>             	System.out.println("ERROR abriendo archivo" + Ontofile);
>             	return;
>             	}
>             else {  m.read(in, "RDF/XML");
>                	System.out.println("archivo" + Ontofile + "leido
> exitosamente" );
>             	}
>         } catch (JenaException je) {
>         	System.out.println("ERROR leyendo archivo" + je.getMessage());
>             je.printStackTrace();
>             System.exit(0);
>         }
> 				long startMilC = System.currentTimeMillis();
>         System.out.println("Start list classes: " + startMilC);
>         ExtendedIterator classes = m.listClasses();
>         long endMilC = System.currentTimeMillis();
>         System.out.println("Duration ListIndividuals: " + (endMilC -
> startMilC));
>             long startMil = System.currentTimeMillis();
>         System.out.println("Start ListIndividuals: " + startMil);
>         ExtendedIterator individuos = m.listIndividuals();
>                  long endMil = System.currentTimeMillis();
>         System.out.println("Duration ListIndividuals: " + (endMil -
> startMil));
> 	}
> }
> {code}
> See attached ontology and test case.
> Verified against current 3.0.1-SNAPSHOT.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)