Author: markt
Date: Tue Aug 2 15:44:54 2016
New Revision: 1754964
URL: http://svn.apache.org/viewvc?rev=1754964&view=rev
Log:
Add a logging date format performance test.
It confirms the current implementation is faster than the obvious
alternative.
Added:
tomcat/trunk/test/org/apache/juli/TestOneLineFormatterPerformance.java
(with props)
Added: tomcat/trunk/test/org/apache/juli/TestOneLineFormatterPerformance.java
URL:
http://svn.apache.org/viewvc/tomcat/trunk/test/org/apache/juli/TestOneLineFormatterPerformance.java?rev=1754964&view=auto
==============================================================================
--- tomcat/trunk/test/org/apache/juli/TestOneLineFormatterPerformance.java
(added)
+++ tomcat/trunk/test/org/apache/juli/TestOneLineFormatterPerformance.java Tue
Aug 2 15:44:54 2016
@@ -0,0 +1,74 @@
+/*
+ * 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.juli;
+
+import org.junit.Test;
+
+/**
+ * Compares date/time format implementations. The current implementation
({@link
+ * DateFormatCache} is one to two orders of magnitude faster than
+ * {@link String#format(String, Object...)}
+ */
+public class TestOneLineFormatterPerformance {
+
+ @Test
+ public void testDateFormat() throws Exception {
+
+ int iters = 1000000;
+ DateFormat[] dfs = new DateFormat[] { new StringFormatImpl(), new
DateFormatCacheImpl() };
+
+ for (DateFormat df : dfs) {
+ long start = System.nanoTime();
+ for (int i = 0; i < iters; i++) {
+ df.format(System.nanoTime());
+ }
+ long end = System.nanoTime();
+ System.out.println(
+ "Impl: [" + df.getClass().getName() + "] took [" +
(end-start) + "] ns");
+ }
+
+ }
+
+
+ private interface DateFormat {
+ String format(long timestamp);
+ }
+
+
+ private class StringFormatImpl implements DateFormat {
+
+ @Override
+ public String format(long timestamp) {
+ return String.format("%1$td-%1$tb-%1$tY %1$tH:%1$tM:%1$tS",
Long.valueOf(timestamp));
+ }
+ }
+
+
+ private class DateFormatCacheImpl implements DateFormat {
+
+ private final DateFormatCache cache;
+
+ public DateFormatCacheImpl() {
+ cache = new DateFormatCache(5, "dd-MMM-yyyy HH:mm:ss", null);
+ }
+
+ @Override
+ public String format(long timestamp) {
+ return cache.getFormat(timestamp);
+ }
+ }
+}
Propchange:
tomcat/trunk/test/org/apache/juli/TestOneLineFormatterPerformance.java
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