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test/org/apache/catalina/connector/TestResponsePerformance.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.catalina.connector;
+
+import java.net.URI;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.apache.catalina.startup.LoggingBaseTest;
+import org.apache.tomcat.unittest.TesterRequest;
+
+public class TestResponsePerformance extends LoggingBaseTest {
+
+    private final int ITERATIONS = 100000;
+
+    @Test
+    public void testToAbsolutePerformance() throws Exception {
+        Request req = new TesterRequest();
+        Response resp = new Response();
+        resp.setRequest(req);
+
+        // Warm up
+        doHomebrew(resp);
+        doUri();
+
+        // Note: Java 9 on my OSX laptop consistently shows doUri() is faster
+        //       than doHomebrew(). Worth a closer look for Tomcat 10 on the
+        //       assumption it will require java 9
+
+        // To allow for timing differences between runs, a "best of n" approach
+        // is taken for this test
+        final int bestOf = 5;
+        final int winTarget = (bestOf + 1) / 2;
+        int homebrewWin = 0;
+        int count = 0;
+
+        while (count < bestOf && homebrewWin < winTarget) {
+            long homebrew = doHomebrew(resp);
+            long uri = doUri();
+            log.info("Current 'home-brew': " + homebrew + "ms, Using URI: " + uri + "ms");
+            if (homebrew < uri) {
+                homebrewWin++;
+            }
+            count++;
+        }
+        Assert.assertTrue(homebrewWin == winTarget);
+    }
+
+
+    private long doHomebrew(Response resp) {
+        long start = System.currentTimeMillis();
+        for (int i = 0; i < ITERATIONS; i++) {
+            resp.toAbsolute("bar.html");
+        }
+        return System.currentTimeMillis() - start;
+    }
+
+
+    private long doUri() {
+        long start = System.currentTimeMillis();
+        for (int i = 0; i < ITERATIONS; i++) {
+            URI base = URI.create(
+                    "http://localhost:8080/level1/level2/foo.html");
+            base.resolve(URI.create("bar.html")).toASCIIString();
+        }
+        return System.currentTimeMillis() - start;
+    }
+}