apm-sniffer/apm-sdk-plugin/solrj-7.x-plugin/src/test/java/org/apache/skywalking/apm/plugin/solrj/StringFormatBenchmarkTest.java

/*
 * 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.skywalking.apm.plugin.solrj;

import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.util.concurrent.TimeUnit;

/**
 * Benchmark                                Mode  Cnt    Score    Error   Units StringFormatBenchmark.testStringConcat
 * thrpt   10  326.444 ± 46.432  ops/ms StringFormatBenchmark.testStringFormat  thrpt   10    6.094 ±  1.065  ops/ms
 */
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.MILLISECONDS)
@State(Scope.Thread)
@Fork(2)
@Warmup(iterations = 4)
@Measurement(iterations = 5)
public class StringFormatBenchmarkTest {
    @Benchmark
    public void testStringFormat() {
        for (int i = 0; i < 100; i++) {
            String.format("solrJ/%s%s/%s", i, i, i);
        }
    }

    @Benchmark
    public void testStringConcat() {
        for (int i = 0; i < 100; i++) {
            String a = "solrJ/" + i + i + "/" + i;
        }
    }

    @BenchmarkMode(Mode.AverageTime)
    @OutputTimeUnit(TimeUnit.MICROSECONDS)
    public static void main(String[] args) throws RunnerException {
        Options options = new OptionsBuilder().include(StringFormatBenchmarkTest.class.getSimpleName()).build();
        new Runner(options).run();
    }
}