Repository: logging-log4j2 Updated Branches: refs/heads/master 72ef0eb4c -> b38f0cb56
LOG4J2-812 added JMH benchmark Project: http://git-wip-us.apache.org/repos/asf/logging-log4j2/repo Commit: http://git-wip-us.apache.org/repos/asf/logging-log4j2/commit/e5484796 Tree: http://git-wip-us.apache.org/repos/asf/logging-log4j2/tree/e5484796 Diff: http://git-wip-us.apache.org/repos/asf/logging-log4j2/diff/e5484796 Branch: refs/heads/master Commit: e54847961bfc139abbe8bf86885fda6951b40f59 Parents: 8d4dc1f Author: rpopma <[email protected]> Authored: Sun Jul 5 16:29:05 2015 +0900 Committer: rpopma <[email protected]> Committed: Sun Jul 5 16:29:05 2015 +0900 ---------------------------------------------------------------------- .../perf/jmh/SimpleDateFormatBenchmark.java | 81 ++++++++++++++++++++ 1 file changed, 81 insertions(+) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/e5484796/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/SimpleDateFormatBenchmark.java ---------------------------------------------------------------------- diff --git a/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/SimpleDateFormatBenchmark.java b/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/SimpleDateFormatBenchmark.java new file mode 100644 index 0000000..2e6e620 --- /dev/null +++ b/log4j-perf/src/main/java/org/apache/logging/log4j/perf/jmh/SimpleDateFormatBenchmark.java @@ -0,0 +1,81 @@ +/* + * 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.logging.log4j.perf.jmh; + +import java.text.SimpleDateFormat; +import java.util.Date; +import java.util.concurrent.TimeUnit; + +import org.openjdk.jmh.annotations.Benchmark; +import org.openjdk.jmh.annotations.BenchmarkMode; +import org.openjdk.jmh.annotations.Mode; +import org.openjdk.jmh.annotations.OutputTimeUnit; +import org.openjdk.jmh.annotations.Scope; +import org.openjdk.jmh.annotations.State; + +/** + * Tests performance of various ways to use SimpleDateFormat in a thread-safe manner. + */ +// ============================== HOW TO RUN THIS TEST: ==================================== +// +// single thread: +// java -jar log4j-perf/target/benchmarks.jar ".*SimpleDateFormat.*" -f 1 -wi 5 -i 5 +// +// multiple threads (for example, 4 threads): +// java -jar log4j-perf/target/benchmarks.jar ".*SimpleDateFormat.*" -f 1 -wi 5 -i 5 -t 4 -si true +// +// Usage help: +// java -jar log4j-perf/target/benchmarks.jar -help +// +@State(Scope.Benchmark) +public class SimpleDateFormatBenchmark { + + private final Date date = new Date(); + private SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm:ss.SSS"); + private ThreadLocal<SimpleDateFormat> threadLocal = new ThreadLocal<SimpleDateFormat>() { + @Override + protected SimpleDateFormat initialValue() { + return new SimpleDateFormat("HH:mm:ss.SSS"); + } + }; + + public static void main(final String[] args) { + } + + @Benchmark + @BenchmarkMode(Mode.SampleTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + public void baseline() { + } + + @Benchmark + @BenchmarkMode(Mode.SampleTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + public String synchronizedFormat() { + synchronized (simpleDateFormat) { + return simpleDateFormat.format(date); + } + } + + @Benchmark + @BenchmarkMode(Mode.SampleTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + public String threadLocalFormat() { + return threadLocal.get().format(date); + } +}
