Re: [jboss-dev] Further profling: Where should I focus?

David M. Lloyd wrote: > On 01/05/2010 10:40 AM, Bill Burke wrote: >> Ales Justin wrote: >>> Perhaps this can be solved by custom (+ temp) deployer, >>> which would create capabilities from those exports, >>> but would just say import-all for imports. >>> >> No shit shirlock...Especially when thats what is being done now. >> >> Again, optimizing this algorithm doesn't matter if jars/directories are >> being browsed. > What do you mean by "browsed"? If you're going to access any file in a > JAR, you need to scan the (unordered) ZIP directory anyway. Better to do > it one time and cache it so files can be looked up on an O(1) basis. And > once you've done that, why not use that data for other purposes? > A simple test of using ZipInputStream vs. URLClassLoader to find a resource within jacorb.jar. ZipInputStream: 256ms. URLClassLoader: 5ms. URLClasLoader is obviously using some other mechanism to find things. public void testZipStream() throws Exception { URL url = Thread.currentThread().getContextClassLoader().getResource("jacorb.jar"); ZipInputStream zis = new ZipInputStream(url.openStream()); Map<String, ZipEntry> map = new HashMap<String, ZipEntry>(); ZipEntry entry = null; while ((entry = zis.getNextEntry()) != null) { map.put(entry.getName(), entry); } } public void testClassLoader() throws Exception { URL[] urls = {Thread.currentThread().getContextClassLoader().getResource("jacorb.jar")}; URLClassLoader cl = new URLClassLoader(urls); URL url = cl.getResource("org/jacorb/orb/portableInterceptor/RequestInterceptorIterator.class"); System.out.println(url); } -- Bill Burke JBoss, a division of Red Hat http://bill.burkecentral.com _______________________________________________ jboss-development mailing list jboss-development(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-development