Bad performance loading resources from JBoss jars after Facelets-using application starts

Issue

• We had experimented a big performance issue after the admin-console started for the first time in JBoss 5.1 EAP.
• We are seeing bad performance, and profiling shows that a substantial amount of time is spent verifying the signatures on JBoss jars:

  at java.util.HashMap.createEntry(HashMap.java:901)
  at java.util.HashMap.addEntry(HashMap.java:888)
  at java.util.HashMap.put(HashMap.java:509)
  at java.util.jar.Attributes.put(Attributes.java:148)
  at java.util.jar.Attributes.putValue(Attributes.java:168)
  at java.util.jar.Attributes.read(Attributes.java:421)
  at java.util.jar.Manifest.read(Manifest.java:251)
  at sun.security.util.SignatureFileVerifier.processImpl(SignatureFileVerifier.java:206)
  at sun.security.util.SignatureFileVerifier.process(SignatureFileVerifier.java:193)
  at java.util.jar.JarVerifier.processEntry(JarVerifier.java:305)
  at java.util.jar.JarVerifier.update(JarVerifier.java:216)
  at java.util.jar.JarFile.initializeVerifier(JarFile.java:345)
  at java.util.jar.JarFile.getInputStream(JarFile.java:412)
  - locked <0x00000006905c1bf0> (a sun.net.www.protocol.jar.URLJarFile)
  at sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:162)
  ...