OK, NoCopy speeds things up. But doing some more profiling, looks like our VirtualFileURLConnection is the cause of it all. :-) Getting loads of this: | http-127.0.0.1-8080-3 [RUNNABLE] | java.util.zip.ZipFile.freeEntry(native method) | java.util.zip.ZipFile.access$1100(ZipFile.java:35) | java.util.zip.ZipFile$3.nextElement(ZipFile.java:438) | java.util.zip.ZipFile$3.nextElement(ZipFile.java:415) | java.util.jar.JarFile$1.nextElement(JarFile.java:221) | java.util.jar.JarFile$1.nextElement(JarFile.java:220) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler$JarEntryEnumeration.nextElement(AbstractStructuredJarHandler.java:347) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler$JarEntryEnumeration.nextElement(AbstractStructuredJarHandler.java:329) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler.initJarFile(AbstractStructuredJarHandler.java:133) | org.jboss.virtual.plugins.context.jar.AbstractStructuredJarHandler.initJarFile(AbstractStructuredJarHandler.java:107) | org.jboss.virtual.plugins.context.jar.JarHandler.<init>(JarHandler.java:79) | org.jboss.virtual.plugins.context.file.FileSystemContext.createVirtualFileHandler(FileSystemContext.java:182) | org.jboss.virtual.plugins.context.file.FileHandler.getChildren(FileHandler.java:177) | org.jboss.virtual.plugins.context.file.FileSystemContext.createVirtualFileHandler(FileSystemContext.java:242) | org.jboss.virtual.plugins.context.file.FileSystemContext.createVirtualFileHandler(FileSystemContext.java:189) | org.jboss.virtual.plugins.context.file.FileHandler.createChildHandler(FileHandler.java:214) | org.jboss.virtual.plugins.context.AbstractVirtualFileHandler.structuredFindChild(AbstractVirtualFileHandler.java:359) | org.jboss.virtual.plugins.context.file.FileHandler.findChild(FileHandler.java:197) | org.jboss.virtual.plugins.context.AbstractVFSContext.findChild(AbstractVFSContext.java:125) | org.jboss.virtual.VFS.findChild(VFS.java:208) | org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.resolveVirtualFile(VirtualFileURLConnection.java:96) | org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.getVirtualFile(VirtualFileURLConnection.java:109) | org.jboss.virtual.plugins.vfs.VirtualFileURLConnection.getInputStream(VirtualFileURLConnection.java:117) | java.net.URL.openStream(URL.java:1007) | Creating new VirtualFile for every new connection. Meaning it builds the whole jar structure to get to a single resource. Scott, does your url-connection branch deal with this? Or where/how to plug-in this sore of cache: url --> virtual file? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116124#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...