Speeding up import of data into Neo4j graph database

[Dim]

I'm working on a project in which we have to create graphs from reading an xml file with the nodes information, I already have this part, but the process creating the nodes and the relationships is too long, it takes 31 minutes in computer with Core 2 Duo, 6GB RAM, on Windows and 16 minutes on Fedora, in other computer Core i5 and 4GB RAM takes aprox. 3 minutes and in a Core i7 computer.So, my question here is, what's wrong? What can I do to acelerate this process?I modified the configuration file \[code\]neo4j.properties\[/code\] and no effect at all, it continues taking too long, any idea about that?Thanks.