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test/org/apache/tomcat/util/http/TesterParametersPerformance.java

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+/*
+ *  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.tomcat.util.http;
+
+import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.util.logging.Level;
+import java.util.logging.LogManager;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.apache.tomcat.util.buf.B2CConverter;
+
+public class TesterParametersPerformance {
+
+    @Test
+    public void testProcessParametersByteArrayIntInt() {
+        LogManager.getLogManager().getLogger("").setLevel(Level.OFF);
+        doTestProcessParametersMultiple("foo".getBytes());
+    }
+
+    private void doTestProcessParametersMultiple(byte[] input) {
+        System.out.println(doTestProcessParameters(input, 10000));
+        System.out.println(doTestProcessParameters(input, 20000));
+        System.out.println(doTestProcessParameters(input, 40000));
+        System.out.println(doTestProcessParameters(input, 80000));
+        System.out.println(doTestProcessParameters(input, 160000));
+        System.out.println(doTestProcessParameters(input, 320000));
+        System.out.println(doTestProcessParameters(input, 640000));
+        System.out.println(doTestProcessParameters(input, 1280000));
+    }
+
+    private long doTestProcessParameters(byte[] input, int size) {
+        Assert.assertEquals(input.length, 3);
+
+        Parameters p = new Parameters();
+
+        byte[] params = createParams(input, size);
+        //byte[] input = createParams(8);
+        p.setCharset(StandardCharsets.ISO_8859_1);
+        long start = System.nanoTime();
+        p.processParameters(params, 0, params.length);
+        return System.nanoTime() - start;
+    }
+
+    private byte[] createParams(byte[] input, int len) {
+        byte[] result = new byte[len * 4 - 1];
+
+        for (int i = 0; i < len; i++) {
+            result[i * 4] = input[0];
+            result[i * 4 + 1] = input[1];
+            result[i * 4 + 2] = input[2];
+            if (i < len -1) {
+                result[i * 4 + 3] = 38;
+            }
+        }
+        return result;
+    }
+
+    @Test
+    public void testCreateString() throws UnsupportedEncodingException {
+        B2CConverter.getCharset("ISO-8859-1");
+        doCreateStringMultiple("foo");
+    }
+
+    private void doCreateStringMultiple(String input) {
+        System.out.println(doCreateString(input, 10, true));
+        System.out.println(doCreateString(input, 100, true));
+        System.out.println(doCreateString(input, 1000, true));
+        System.out.println(doCreateString(input, 10000, true));
+        System.out.println(doCreateString(input, 100000, true));
+        System.out.println(doCreateString(input, 1000000, true));
+        System.out.println(doCreateString(input, 2000000, true));
+        //System.out.println(doCreateString(input, 4000000, true));
+        //System.out.println(doCreateString(input, 8000000, true));
+        System.out.println(doCreateString(input, 10, false));
+        System.out.println(doCreateString(input, 100, false));
+        System.out.println(doCreateString(input, 1000, false));
+        System.out.println(doCreateString(input, 10000, false));
+        System.out.println(doCreateString(input, 100000, false));
+        System.out.println(doCreateString(input, 1000000, false));
+        System.out.println(doCreateString(input, 2000000, false));
+        //System.out.println(doCreateString(input, 4000000, false));
+        //System.out.println(doCreateString(input, 8000000, false));
+    }
+
+    private long doCreateString(String input, int size,
+            boolean defensiveCopyWorkAround) {
+        int loops = 10000;
+        byte[] inputBytes = input.getBytes();
+        byte[] bytes = new byte[size];
+        int inputLength = inputBytes.length;
+
+        System.arraycopy(inputBytes, 0, bytes, 0, inputLength);
+
+        String[] result = new String[loops];
+        Charset charset = StandardCharsets.ISO_8859_1;
+
+        long start = System.nanoTime();
+        for (int i = 0; i < loops; i++) {
+            if (defensiveCopyWorkAround) {
+                byte[] tmp = new byte[inputLength];
+                System.arraycopy(bytes, 0, tmp, 0, inputLength);
+                result[i] = new String(tmp, 0, inputLength, charset);
+            } else {
+                result[i] = new String(bytes, 0, inputLength, charset);
+            }
+        }
+
+        return System.nanoTime() - start;
+    }
+}