MultiResourcePartitioning same speed as without partitioning in spring batch - spring

Question

Batch Job:
read from a txt file(50k records)
split it into 10 txt files(5k records each)
for each record in the txt create an xml file
The problem is that the same job without the splitting-partitioning(reading from original txt) takes the same amount of time
My configuration:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:batch="http://www.springframework.org/schema/batch" xmlns:task="http://www.springframework.org/schema/task"
xmlns:util="http://www.springframework.org/schema/util" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/batch
http://www.springframework.org/schema/batch/spring-batch-2.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<context:annotation-config/>
<!-- My beans -->
<bean id="task" class="com.example.model.MyModel" scope="prototype" />
<bean id="noInputException" class="com.example.listener.NoWorkFoundStepExecutionListener"/>
<bean id="idNameListener" class="com.example.listener.IdNameListener">
<property name="mriw" ref="multiResourceItemWriter"></property>
</bean>
<bean id="txtsuffix" class="com.example.filename.TxtSuffix"/>
<bean id="headerCallback" class="com.example.listener.HeaderCallBack"/>
<bean id="partitioner"
class="org.springframework.batch.core.partition.support.MultiResourcePartitioner"
scope="step">
<property name="keyName" value="inputFile" />
<property name="resources" value="file:../xml/xmlfiles/*.txt" />
</bean>
<bean id="taskExecutor" class="org.springframework.core.task.SyncTaskExecutor" >
</bean>
<!--<bean id="taskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
<property name="corePoolSize" value="10" />
<property name="maxPoolSize" value="10" />
</bean>-->
<!-- Batch Job declaration -->
<batch:job id="txttoxml">
<batch:step id="step1" next="step2master">
<batch:tasklet>
<batch:chunk reader="fileReader" writer="TXTExporter" commit-interval="1000">
</batch:chunk>
<batch:listeners>
<batch:listener ref="noInputException"/>
<batch:listener ref="idNameListener"/>
</batch:listeners>
</batch:tasklet>
</batch:step>
<batch:step id="step2master">
<partition step="step2" partitioner="partitioner">
<handler grid-size="10" task-executor="taskExecutor"/>
</partition>
</batch:step>
</batch:job>
<batch:step id="step2">
<batch:tasklet>
<batch:chunk reader="fileReaderstep2" writer="multiResourceItemWriter" commit-interval="1">
</batch:chunk>
<batch:listeners>
<batch:listener ref="noInputException"/>
<batch:listener ref="idNameListener"/>
</batch:listeners>
</batch:tasklet>
</batch:step>
<!-- step1 writer -->
<bean id="TXTExporter"
class="org.springframework.batch.item.file.MultiResourceItemWriter">
<property name="resource" value="file:../xml/xmlfiles/xml"></property>
<property name="delegate" ref="flatFileItemWriter"></property>
<property name="itemCountLimitPerResource" value="5000"/>
<property name="resourceSuffixCreator" ref="xmlsuffix"/>
</bean>
<bean id="flatFileItemWriter"
class="org.springframework.batch.item.file.FlatFileItemWriter">
<property name="lineAggregator">
<bean class="org.springframework.batch.item.file.transform.DelimitedLineAggregator">
<property name="delimiter" value="£"/>
<property name="fieldExtractor">
<bean class="org.springframework.batch.item.file.transform.BeanWrapperFieldExtractor">
<property name="names" value="ID,TYPE,NAME,DATESTARTED,DATEENDED" />
</bean>
</property>
</bean>
</property>
</bean>
<bean id="fileReaderstep2"
class="org.springframework.batch.item.file.FlatFileItemReader"
autowire-candidate="false" scope="step">
<property name="resource" value="#{stepExecutionContext[inputFile]}" />
<property name="lineMapper" ref="lineMapper"/>
</bean>
<bean id="multiResourceItemWriter"
class="org.springframework.batch.item.file.MultiResourceItemWriter">
<property name="resource" value="file:../xml/P" />
<property name="delegate" ref="XMLwriter"/>
<property name="itemCountLimitPerResource" value="1"/>
</bean>
<bean id="XMLwriter"
class="org.springframework.batch.item.xml.StaxEventItemWriter">
<property name="marshaller" ref="taskUnmarshaller" />
<property name="rootTagName" value="Task" />
</bean>
<bean id="taskUnmarshaller"
class="org.springframework.oxm.xstream.XStreamMarshaller">
<property name="aliases">
<map>
<entry key="Task"
value="com.example.model.MyModel" />
</map>
</property>
</bean>
<!-- txt format -->
<bean id="fileReader"
class="org.springframework.batch.item.file.FlatFileItemReader">
<property name="lineMapper" ref="lineMapper"/>
<property name="resource" value="file:../original.txt"/>
<property name="strict" value="false"/>
<!-- <property name="linesToSkip" value="1"/> -->
</bean>
<bean id="lineMapper"
class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
<property name="fieldSetMapper" ref="fieldSetMapper"/>
<property name="lineTokenizer" ref="lineTokenizer"/>
</bean>
<bean id="lineTokenizer"
class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
<property name="delimiter" value="£"/>
<property name="names" value="ID,TYPE,NAME,DATESTARTED,DATEENDED"/>
<property name="strict" value="false"></property>
</bean>
<bean id="fieldSetMapper"
class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
<property name="targetType" value="com.example.model.MyModel"/>
</bean>
</beans>
Is there any way to increase performance?