[ http://jira.jboss.com/jira/browse/JBMESSAGING-777?page=comments#action_12... ] Tim Fox commented on JBMESSAGING-777: ------------------------------------- I have created a simple test to compare the performance of creating a new ObjectInput/OutputStream each time compared with re-using them: public void test2() throws Exception { { long start = System.currentTimeMillis(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); for (int i = 0; i < 100000; i++) { ObjectOutputStream oos = new ObjectOutputStream(baos); SimpleObj obj = new SimpleObj(true); oos.writeObject(obj); oos.close(); } byte[] bytes = baos.toByteArray(); ByteArrayInputStream bais = new ByteArrayInputStream(bytes); for (int i = 0; i < 100000; i++) { ObjectInputStream ois = new ObjectInputStream(bais); SimpleObj obj2 = (SimpleObj)ois.readObject(); //log.info("obj2 is " + obj2); ois.close(); //log.info("did " + i); } long end = System.currentTimeMillis(); log.info("that took " + (end - start) + " ms"); } { long start = System.currentTimeMillis(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ObjectOutputStream oos = new ObjectOutputStream(baos); for (int i = 0; i < 100000; i++) { SimpleObj obj = new SimpleObj(true); oos.writeObject(obj); oos.flush(); } byte[] bytes = baos.toByteArray(); ByteArrayInputStream bais = new ByteArrayInputStream(bytes); ObjectInputStream ois = new ObjectInputStream(bais); for (int i = 0; i < 100000; i++) { SimpleObj obj2 = (SimpleObj)ois.readObject(); //log.info("obj2 is " + obj2); //log.info("did " + i); } ois.close(); long end = System.currentTimeMillis(); log.info("that took " + (end - start) + " ms"); } } 000, pageSize=2000, downCacheSize=2000 @main 23:57:48,250 INFO [SimpleTest] that took 11391 ms @main 23:57:56,187 INFO [SimpleTest] that took 7937 ms So there is about a 40% difference. Considering that serialization is only used for object message bodies, and remoting internal invocations I don't see this is a big issue. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira