diff -r 4ebc2e2fb97c -r 71c04702a3d5 test/jdk/sun/nio/cs/StrCodingBenchmarkDB.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/sun/nio/cs/StrCodingBenchmarkDB.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.util.*;
+import java.nio.*;
+import java.nio.charset.*;
+import java.util.concurrent.*;
+import java.util.regex.Pattern;
+
+public class StrCodingBenchmarkDB extends StrCodingBenchmark {
+
+
+    public static void main(String[] args) throws Throwable {
+        final int itrs = Integer.getInteger("iterations", 100000);
+        //final int itrs = Integer.getInteger("iterations", 12);
+        final int size       = Integer.getInteger("size", 2048);
+        final int subsize    = Integer.getInteger("subsize", 128);
+        final int maxchar    = Integer.getInteger("maxchar", 128);
+        final String regex = System.getProperty("filter");
+        final Pattern filter = (regex == null) ? null : Pattern.compile(regex);
+        final boolean useSecurityManager = Boolean.getBoolean("SecurityManager");
+        if (useSecurityManager)
+            System.setSecurityManager(new PermissiveSecurityManger());
+        final Random rnd = new Random();
+
+        String[] csns = new String[] {
+            "Big5",
+            "Johab",
+            "EUC_CN",
+            "EUC_KR",
+            "MS932",
+            "MS936",
+            "MS949",
+            "MS950",
+            "GBK",
+
+            "Big5_HKSCS",
+            "Big5_HKSCS_2001",
+            "Big5_Solaris",
+            "MS950_HKSCS",
+            "MS950_HKSCS_XP",
+            "IBM1364",
+            "IBM1381",
+            "IBM1383",
+            "IBM930",
+            "IBM933",
+            "IBM935",
+            "IBM937",
+            "IBM939",
+            "IBM942",
+            "IBM943",
+            "IBM948",
+            "IBM949",
+            "IBM950",
+            "IBM970",
+        };
+
+        ArrayList<long[]> sum = new ArrayList<>();
+
+        for (final String csn : csns) {
+            final Charset cs = Charset.forName(csn);
+            List<Integer> cps = new ArrayList<>(0x4000);
+            int off = 0;
+            int cp = 0;
+            int n = 0;
+            CharsetEncoder enc = cs.newEncoder();
+            while (cp < 0x10000 && n < cps.size()) {
+                if (enc.canEncode((char)cp)) {
+                    cps.add(cp);
+                    n++;
+                }
+                cp++;
+            }
+            Collections.shuffle(cps);
+            char[] ca = new char[cps.size()];
+            for (int i = 0; i < cps.size(); i++)
+                ca[i] = (char)(int)cps.get(i);
+
+
+            System.out.printf("%n--------%s---------%n", csn);
+            for (int sz = 8; sz <= 2048; sz *= 2) {
+                System.out.printf("   [len=%d]%n", sz);
+
+                final char[] chars  = Arrays.copyOf(ca, sz);
+                final String str = new String(chars);
+                final byte[] bs  = str.getBytes(cs);
+
+                Job[] jobs = {
+
+                    new Job("String decode: csn") {
+                    public void work() throws Throwable {
+                        for (int i = 0; i < itrs; i++)
+                            new String(bs, csn);
+                    }},
+
+                    new Job("String decode: cs") {
+                    public void work() throws Throwable {
+                        for (int i = 0; i < itrs; i++)
+                            new String(bs, cs);
+                    }},
+
+                    new Job("String encode: csn") {
+                    public void work() throws Throwable {
+                        for (int i = 0; i < itrs; i++)
+                            str.getBytes(csn);
+                    }},
+
+                    new Job("String encode: cs") {
+                    public void work() throws Throwable {
+                        for (int i = 0; i < itrs; i++)
+                            str.getBytes(cs);
+                    }},
+                };
+                sum.add(time(jobs));
+
+            }
+        }
+    }
+}