--- Revision None
+++ Revision 653337376466
@@ -0,0 +1,68 @@
+package zip.simple;
+
+import com.jcraft.jzlib.ZStream;
+import java.io.FileInputStream;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+import java.util.jar.JarEntry;
+import java.util.jar.JarInputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+/**
+ * @author Romain Manni-Bucau
+ */
+public class Main {
+    public static void main(String[] a) {
+        final String filename = "/home/rmannibucau/Bureau/openejb-core-3.1.4.jar";
+        final int nTimes = 100;
+
+        long start = 0, end = 0;
+        List<String> list = new ArrayList<String>();
+
+        // jdk way: jar
+        for (int i = 0; i < nTimes; i++) {
+            list.clear();
+
+            try {
+                JarInputStream jarFile = new JarInputStream(new FileInputStream(filename));
+                JarEntry jarEntry;
+
+                start = System.nanoTime();
+                while ((jarEntry = jarFile.getNextJarEntry()) != null) {
+                    if (jarEntry.getName().endsWith(".class")) {
+                        list.add(jarEntry.getName().replaceAll("/", "\\."));
+                    }
+                }
+                end = System.nanoTime();
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        System.out.println(TimeUnit.NANOSECONDS.toMillis(end - start) + " for " + list.size() + " classes ");
+
+        // jdk way: zip
+        for (int i = 0; i < nTimes; i++) {
+            list.clear();
+
+            try {
+                ZipFile zipFile = new ZipFile(filename);
+                Enumeration<? extends ZipEntry> zipEntries = zipFile.entries();
+
+                start = System.nanoTime();
+                while (zipEntries.hasMoreElements()) {
+                    ZipEntry entry = zipEntries.nextElement();
+                    if (entry.getName().endsWith(".class")) {
+                        list.add(entry.getName().replaceAll("/", "\\."));
+                    }
+                }
+                end = System.nanoTime();
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+        System.out.println(TimeUnit.NANOSECONDS.toMillis(end - start) + " for " + list.size() + " classes ");
+    }
+}