title: Java 1.4 Class performance on 1.5 JVM
body: <p>Switching from JVM 1.4 to 1.5 has performance benefits as per release notes.
  <a href="http://java.sun.com/j2se/1.5.0/docs/relnotes/features.html#performance" rel="nofollow noreferrer">http://java.sun.com/j2se/1.5.0/docs/relnotes/features.html#performance</a></p>
  
  <p>We have Java 1.4 compiled classes which are run on 1.5 JVM, will these classes suffer in performance because they were compiled using 1.4 ? </p>