1 files changed, 156 insertions, 0 deletions
diff --git a/src/test/java/org/apache/commons/lang3/CharUtilsPerfRun.java b/src/test/java/org/apache/commons/lang3/CharUtilsPerfRun.java
new file mode 100644
index 000000000..1aa4d9879
--- /dev/null
+++ b/src/test/java/org/apache/commons/lang3/CharUtilsPerfRun.java
@@ -0,0 +1,156 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.lang3;
+
+import java.text.NumberFormat;
+import java.util.Calendar;
+
+/**
+ * Tests the difference in performance between CharUtils and CharSet.
+ *
+ * Sample runs:
+
+Now: Thu Mar 18 14:29:48 PST 2004
+Sun Microsystems Inc. Java(TM) 2 Runtime Environment, Standard Edition 1.3.1_10-b03
+Sun Microsystems Inc. Java HotSpot(TM) Client VM 1.3.1_10-b03
+Windows XP 5.1 x86 pentium i486 i386
+Do nothing: 0 milliseconds.
+run_CharUtils_isAsciiNumeric: 4,545 milliseconds.
+run_inlined_CharUtils_isAsciiNumeric: 3,417 milliseconds.
+run_inlined_CharUtils_isAsciiNumeric: 85,679 milliseconds.
+
+
+Now: Thu Mar 18 14:24:51 PST 2004
+Sun Microsystems Inc. Java(TM) 2 Runtime Environment, Standard Edition 1.4.2_04-b05
+Sun Microsystems Inc. Java HotSpot(TM) Client VM 1.4.2_04-b05
+Windows XP 5.1 x86 pentium i486 i386
+Do nothing: 0 milliseconds.
+run_CharUtils_isAsciiNumeric: 2,578 milliseconds.
+run_inlined_CharUtils_isAsciiNumeric: 2,477 milliseconds.
+run_inlined_CharUtils_isAsciiNumeric: 114,429 milliseconds.
+
+Now: Thu Mar 18 14:27:55 PST 2004
+Sun Microsystems Inc. Java(TM) 2 Runtime Environment, Standard Edition 1.4.2_04-b05
+Sun Microsystems Inc. Java HotSpot(TM) Server VM 1.4.2_04-b05
+Windows XP 5.1 x86 pentium i486 i386
+Do nothing: 0 milliseconds.
+run_CharUtils_isAsciiNumeric: 630 milliseconds.
+run_inlined_CharUtils_isAsciiNumeric: 709 milliseconds.
+run_inlined_CharUtils_isAsciiNumeric: 84,420 milliseconds.
+
+
+ */
+public class CharUtilsPerfRun {
+    private static final String VERSION = "$Id$";
+
+    private static final int WARM_UP = 100;
+
+    private static final int COUNT = 5000;
+
+    private static final char[] CHAR_SAMPLES;
+
+    static {
+        CHAR_SAMPLES = new char[Character.MAX_VALUE];
+        for (char i = Character.MIN_VALUE; i < Character.MAX_VALUE; i++) {
+            CHAR_SAMPLES[i] = i;
+        }
+    }
+
+    public static void main(final String[] args) {
+        new CharUtilsPerfRun().run();
+    }
+
+    private void printSysInfo() {
+        System.out.println(VERSION);
+        System.out.println("Now: " + Calendar.getInstance().getTime());
+        System.out.println(System.getProperty("java.vendor")
+                + " "
+                + System.getProperty("java.runtime.name")
+                + " "
+                + System.getProperty("java.runtime.version"));
+        System.out.println(System.getProperty("java.vm.vendor")
+                + " "
+                + System.getProperty("java.vm.name")
+                + " "
+                + System.getProperty("java.vm.version"));
+        System.out.println(System.getProperty("os.name")
+            + " "
+            + System.getProperty("os.version")
+            + " "
+            + System.getProperty("os.arch")
+            + " "
+            + System.getProperty("sun.cpu.isalist"));
+    }
+
+    private void run() {
+        this.printSysInfo();
+        long startMillis;
+        startMillis = System.currentTimeMillis();
+        this.printlnTotal("Do nothing", startMillis);
+        run_CharUtils_isAsciiNumeric(WARM_UP);
+        startMillis = System.currentTimeMillis();
+        run_CharUtils_isAsciiNumeric(COUNT);
+        this.printlnTotal("run_CharUtils_isAsciiNumeric", startMillis);
+        run_inlined_CharUtils_isAsciiNumeric(WARM_UP);
+        startMillis = System.currentTimeMillis();
+        run_inlined_CharUtils_isAsciiNumeric(COUNT);
+        this.printlnTotal("run_inlined_CharUtils_isAsciiNumeric", startMillis);
+        run_CharSet(WARM_UP);
+        startMillis = System.currentTimeMillis();
+        run_CharSet(COUNT);
+        this.printlnTotal("run_CharSet", startMillis);
+    }
+
+    private int run_CharSet(final int loopCount) {
+        int t = 0;
+        for (int i = 0; i < loopCount; i++) {
+            for (final char ch : CHAR_SAMPLES) {
+                final boolean b = CharSet.ASCII_NUMERIC.contains(ch);
+                t += b ? 1 : 0;
+            }
+        }
+        return t;
+    }
+
+    private int run_CharUtils_isAsciiNumeric(final int loopCount) {
+        int t = 0;
+        for (int i = 0; i < loopCount; i++) {
+            for (final char ch : CHAR_SAMPLES) {
+                final boolean b = CharUtils.isAsciiNumeric(ch);
+                t += b ? 1 : 0;
+            }
+        }
+        return t;
+    }
+
+    private int run_inlined_CharUtils_isAsciiNumeric(final int loopCount) {
+        int t = 0;
+        for (int i = 0; i < loopCount; i++) {
+            for (final char ch : CHAR_SAMPLES) {
+                final boolean b = ch >= '0' && ch <= '9';
+                t += b ? 1 : 0;
+            }
+        }
+        return t;
+    }
+
+    private void printlnTotal(final String prefix, final long startMillis) {
+        final long totalMillis = System.currentTimeMillis() - startMillis;
+        System.out.println(prefix + ": " + NumberFormat.getInstance().format(totalMillis) + " milliseconds.");
+    }
+}