Can you raise a GitHub issue for this?
On Wed, Jun 8, 2016 at 12:23 PM, Kamilos <k19me...@gmail.com> wrote:
> Hello,
>
> I found something which is very strange.
>
> I have a graph with 100 000 nodes where a node has a property "age".
>
> If i want to update the property "age" of 50 nodes with the Java API
>
> Node node;
> ArrayList<Node> toUpdate=new ArrayList<Node
> time1=System.nanoTime();
>
> try (Transaction tx = graphDb.beginTx()) {
>
> for(int i = 1;i<=50;i++){
> node = graphDb.findNode(labelPerson, "name", i);
> if(node != null)
> toUpdate.add(node);
> }
> for(int i = 0;i<toDelete1.size();i++){
> toUpdate.get(i).setProperty("age", Math.random());
> //SOLUTION 1 // generate a double between 0.000000 and 1.0000000
> toUpdate.get(i).setProperty("age", String.valueOf(Math.random()));
> //SOLUTION 2 // same number but stored as a string
> }
> tx.success();
> }
>
> time2=System.nanoTime();
>
>
>
>
> If I store the random double value as a double, it takes a lot of time to
> perform this operation. (201 seconds !!!)
> Same issue if it is stored as a float.
>
> However, If I store the same random value but as a String it is
> instantaneous.
>
>
> Any reason why ? Is it related to the internal Lucene Index having issues
> with this ?
>
> While inserting the data, I created the index the following way :
>
> public static String propertyAge = "age";
> inserter = BatchInserters.inserter(new File(Const.DB_PATH_Neo4J));
> inserter.createDeferredSchemaIndex(personLabel).on(propertyAge).create();
>
>
> I using Neo4J 3.0.0
>
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