#38 PooledPBEStringEncryptor No performance boost!!!

[kozla13]

No performance boost after using PooledPBEStringEncryptor ?
I configured it like this:
<bean id="user-content-strEncryptor" parent="encryptorProps" class="">
<property name="poolSize">
<value>4</value>
</property>
</bean>

am i doing something wrong ?