Get the persistencUnit using EntittyManager Taking 4 seconds

[SreeAsh]

Hi 

 I am using the following code to get the persistenceUnit, but taking 4
seconds to connect can i reduce the same.please find the below code

 public static EntityManager getSQLEM() {
        try {
            if (em == null) {
                emf =
Persistence.createEntityManagerFactory(ConstantUtil.SQLSERVER_PERSISIT_UNIT);
                em = emf.createEntityManager();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return em;
    }

and i have the persistence xml like this 
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd";>

  <!--SQl Server Persistence Unit-->
  <persistence-unit name="CRMSQL" transaction-type="RESOURCE_LOCAL">
   
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
 
    <class>com.epoint.entity.common.UserInformation</class>
    <class>com.epoint.entity.common.ProductUserRole</class>
    <class>com.epoint.entity.common.ProductRoleObject</class>
    <class>com.epoint.entity.common.ProductObject</class>
    <class>com.epoint.entity.common.AccessLookup</class>
    <class>com.epoint.entity.common.CompoundKeyAccessLookup</class>

    <!--Srini Added-->
     <class>com.epoint.entity.campaign.Campaign</class>
    
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="openjpa.ConnectionUserName" value="sa"/>
      <property name="openjpa.ConnectionPassword" value="password"/>
      <property name="openjpa.ConnectionURL"
value="jdbc:sqlserver://host:port;databaseName=test"/>
      <property name="openjpa.ConnectionDriverName"
value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
      <property name="openjpa.jdbc.Schema" value="dbo"/>
      <!--<property name="openjpa.Log" value="DefaultLevel=ERROR,
SQL=TRACE"/>-->
    </properties>
  </persistence-unit>
  <!--SQl Server Persistence Unit End-->

</persistence>

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