--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/openjdk/gcbench/wip/TreeMapWrite.java	Wed Jul 04 12:58:06 2018 +0200
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2018, Red Hat Inc. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+package org.openjdk.gcbench.wip;
+
+import org.openjdk.jmh.annotations.*;
+
+import java.util.TreeMap;
+import java.util.concurrent.ThreadLocalRandom;
+import java.util.concurrent.TimeUnit;
+
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(value = 1, jvmArgsAppend = "-XX:-TieredCompilation")
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@Threads(1)
+@State(Scope.Benchmark)
+public class TreeMapWrite {
+
+    @Param("1000")
+    int size;
+
+    TreeMap<String, String> map;
+
+    String[] strs;
+
+    @Setup
+    public void setup() {
+        map = new TreeMap<>();
+        strs = new String[size];
+        for (int c = 0; c < size; c++) {
+            strs[c] = "Key" + ThreadLocalRandom.current().nextInt();
+        }
+    }
+
+    @Benchmark
+    public void test() {
+        String k = strs[ThreadLocalRandom.current().nextInt(size)];
+        String v = strs[ThreadLocalRandom.current().nextInt(size)];
+        workWith(k, v);
+    }
+
+    public void workWith(String k, String v) {
+        map.put(k, v);
+    }
+
+}