/*
* 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;
/*
* This is a relative performance test so it remains part of the standard test run. If the test fails then we need to
* looking at why and possibly disable/remove the homebrew approach for some OS/Java combinations.
*/
public class TestResponsePerformance extends LoggingBaseTest {
private static final int ITERATIONS = 1000000;
@Test
public void testToAbsolutePerformance() throws Exception {
Request req = new TesterRequest();
Response resp = new Response(null);
resp.setRequest(req);
// Warm up
doHomebrew(resp);
doUri();
// Note: With Java 11 the 'homebrew' approach is consistently 3-4 times faster on both MacOS (Intel) and Linux
// With Java 22 EA the 'homebrew' approach is consistently a little over 2x faster on MacOS (M1)
// 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;
}
}